diff --git a/tienda_ilusion/don_confiao/models.py b/tienda_ilusion/don_confiao/models.py
index 71772d1..1c50852 100644
--- a/tienda_ilusion/don_confiao/models.py
+++ b/tienda_ilusion/don_confiao/models.py
@@ -37,6 +37,21 @@ class Product(models.Model):
     def __str__(self):
         return self.name
 
+    @classmethod
+    def to_list(cls):
+        products_list = []
+        all_products = cls.objects.all()
+        for product in all_products:
+            rproduct = {
+                "id": product.id,
+                "name": product.name,
+                "price_list": product.price,
+                "uom": product.measuring_unit,
+                "categories": [c.name for c in product.categories.all()]
+            }
+            products_list.append(rproduct)
+        return products_list
+
 
 class Sale(models.Model):
     customer = models.ForeignKey(Customer, on_delete=models.PROTECT)
diff --git a/tienda_ilusion/don_confiao/static/js/add_line.js b/tienda_ilusion/don_confiao/static/js/add_line.js
index 4f6bc25..ab448ff 100644
--- a/tienda_ilusion/don_confiao/static/js/add_line.js
+++ b/tienda_ilusion/don_confiao/static/js/add_line.js
@@ -25,5 +25,6 @@ document.addEventListener('DOMContentLoaded', function(){
 
     formContainer.appendChild(newForm);
     totalForms.value = formCount + 1;
+    setPriceListeners();
   });
 });
diff --git a/tienda_ilusion/don_confiao/static/js/buy_general.js b/tienda_ilusion/don_confiao/static/js/buy_general.js
new file mode 100644
index 0000000..db2a719
--- /dev/null
+++ b/tienda_ilusion/don_confiao/static/js/buy_general.js
@@ -0,0 +1,22 @@
+setPriceListeners();
+
+function setPriceListeners() {
+    document.querySelectorAll('select[id^="id_saleline_set-"][id$="-product"]').forEach((input) => {
+        input.addEventListener('change', (e) => setLinePrice(e));
+    });
+}
+
+function setLinePrice(e) {
+    let input = e.target;
+    const idLine = input.id.split('-')[1];
+    const productId = input.value;
+    const priceInput = document.getElementById(`id_saleline_set-${idLine}-unit_price`);
+
+    const product = listProducts.find((product) => product.id == productId);
+    if (product) {
+        priceInput.value = product.price_list;
+    } else {
+        priceInput.value = '';
+    }
+}
+
diff --git a/tienda_ilusion/don_confiao/templates/don_confiao/purchase.html b/tienda_ilusion/don_confiao/templates/don_confiao/purchase.html
index b6c8598..359ae76 100644
--- a/tienda_ilusion/don_confiao/templates/don_confiao/purchase.html
+++ b/tienda_ilusion/don_confiao/templates/don_confiao/purchase.html
@@ -1,6 +1,9 @@
 {% extends 'don_confiao/base.html' %}
 {% block content %}
 {% load static %}
+<script>
+  let listProducts = JSON.parse("{{ list_products|escapejs }}");
+</script>
 <div class="flex h-full">
   <div class="h-full w-10/12 flex flex-col p-5">
     <form id="complete_form_purchase" method="POST" class="h-10/12 w-full max-h-full overflow-auto">
@@ -12,12 +15,12 @@
           <table class="w-3/4 my-5 shadow-inner" style="border: solid 1px #178E79;">
             {{ form.as_table }}
           </table>
-        </div>
+          </div>
         {% endfor %}
       </div>
-      <div class="h-2/12 flex justify-center">
-        <button id="add_line" type="button" class="bg-yellow-400 shadow hover:shadow-lg py-2 px-5 rounded-full font-bold hover:bg-violet-200 ease-in duration-150" onclick="add_line">Añadir Linea</button>
-      </div>
+    <div class="h-2/12 flex justify-center">
+      <button id="add_line" type="button" class="bg-yellow-400 shadow hover:shadow-lg py-2 px-5 rounded-full font-bold hover:bg-violet-200 ease-in duration-150">Añadir Linea</button>
+    </div>
   </div>
   <div class="h-full w-3/12 bg-green-400 p-5 shadow hover:shadow-lg flex flex-col gap-y-3 font-semibold justify-around">
     <p id="sale_resume_title" class="text-center decoration-solid font-mono font-bold text-xl page_title">Resumen de Venta</p>
@@ -25,9 +28,11 @@
     {{ summary_form }}
     <button class="font-bold my-10 py-2 px-4 rounded-full bg-yellow-400 shadow hover:shadow-lg hover:bg-violet-200 ease-in duration-150" name="form" type="submit" >Comprar</button>
   </div>
-    </form>
+      </form>
 </div>
+
 <script src="https://cdn.tailwindcss.com/"></script>
+<script src="{% static 'js/buy_general.js' %}"></script>
 <script src="{% static 'js/add_line.js' %}"></script>
 <script src="{% static 'js/sale_summary.js' %}"></script>
 <script src="{% static 'js/calculate_subtotal_line.js' %}"></script>
diff --git a/tienda_ilusion/don_confiao/tests/test_buy_form.py b/tienda_ilusion/don_confiao/tests/test_buy_form.py
new file mode 100644
index 0000000..5a61817
--- /dev/null
+++ b/tienda_ilusion/don_confiao/tests/test_buy_form.py
@@ -0,0 +1,22 @@
+from django.test import Client, TestCase
+from ..models import Product
+
+
+class TestBuyForm(TestCase):
+    def setUp(self):
+        self.client = Client()
+        self.product = Product()
+        self.product.name = "Arroz"
+        self.product.price = 5000
+        self.product.save()
+
+    def test_buy_contains_products_list(self):
+        response = self.client.get('/don_confiao/comprar')
+        self.assertIn(
+            self.product.name,
+            response.context['list_products']
+        )
+        content = response.content.decode('utf-8')
+        self.assertIn('5000', content)
+        self.assertIn('Arroz', content)
+        self.assertIn(str(self.product.id), content)
diff --git a/tienda_ilusion/don_confiao/views.py b/tienda_ilusion/don_confiao/views.py
index 63169c4..35b0e0d 100644
--- a/tienda_ilusion/don_confiao/views.py
+++ b/tienda_ilusion/don_confiao/views.py
@@ -8,8 +8,16 @@ from .forms import ImportProductsForm, PurchaseForm, SaleLineFormSet, Reconcilia
 
 import csv
 import io
+import json
+from decimal import Decimal
 
 
+class DecimalEncoder(json.JSONEncoder):
+    def default(self, obj):
+        if isinstance(obj, Decimal):
+            return float(obj)
+        return json.JSONEncoder.default(self, obj)
+
 def index(request):
     return render(request, 'don_confiao/index.html')
 
@@ -47,6 +55,7 @@ def buy(request):
             'sale_form': sale_form,
             'linea_formset': line_formset,
             'summary_form': sale_summary_form,
+            'list_products': json.dumps(Product.to_list(), cls=DecimalEncoder),
         }
     )
 
@@ -60,18 +69,7 @@ def purchases(request):
 
 
 def products(request):
-    rproducts = []
-    products = Product.objects.all()
-    for product in products:
-        rproduct = {
-            "name": product.name,
-            "price_list": product.price,
-            "uom": product.measuring_unit,
-            "categories": [c.name for c in product.categories.all()]
-        }
-        rproducts.append(rproduct)
-
-    return JsonResponse(rproducts, safe=False)
+    return JsonResponse(Product.to_list(), safe=False)
 
 
 def import_products(request):