diff --git a/domain/marketplace/classified_ad.py b/domain/marketplace/classified_ad.py
index 38e640e..b31ecf3 100644
--- a/domain/marketplace/classified_ad.py
+++ b/domain/marketplace/classified_ad.py
@@ -2,7 +2,7 @@ from dataclasses import dataclass, field
 from decimal import Decimal
 
 from domain.marketplace.classified_ad_id import ClassifiedAdId
-from domain.marketplace.money import Money
+from domain.marketplace.price import Price
 from domain.marketplace.user_id import UserId
 
 
@@ -12,4 +12,4 @@ class ClassifiedAd:
     _ownerId: UserId
     title: str
     text: str
-    price: Money = field(default_factory=lambda: Money(amount=Decimal("0.00")))
+    price: Price = field(default_factory=lambda: Price(amount=Decimal("0.00")))
diff --git a/tests/test_classified_ad.py b/tests/test_classified_ad.py
index b2c3e30..86db76c 100644
--- a/tests/test_classified_ad.py
+++ b/tests/test_classified_ad.py
@@ -5,7 +5,7 @@ import pytest
 
 from domain.marketplace.classified_ad import ClassifiedAd
 from domain.marketplace.classified_ad_id import ClassifiedAdId
-from domain.marketplace.money import Money
+from domain.marketplace.price import Price
 from domain.marketplace.user_id import UserId
 
 
@@ -18,14 +18,14 @@ def test_classified_ad_creation():
         _ownerId=owner_id,
         title="Test Title",
         text="Test text content",
-        price=Money(amount=Decimal("99.99")),
+        price=Price(amount=Decimal("99.99")),
     )
 
     assert ad.id == ad_id
     assert ad._ownerId == owner_id
     assert ad.title == "Test Title"
     assert ad.text == "Test text content"
-    assert ad.price == Money(amount=Decimal("99.99"))
+    assert ad.price == Price(amount=Decimal("99.99"))
 
 
 def test_classified_ad_can_not_be_created_without_id():
@@ -34,7 +34,7 @@ def test_classified_ad_can_not_be_created_without_id():
             _ownerId=UserId(value=uuid4()),
             title="Title",
             text="Text",
-            price=Money(amount=Decimal("10.00")),
+            price=Price(amount=Decimal("10.00")),
         )
 
 
@@ -44,7 +44,7 @@ def test_classified_ad_can_not_be_created_without_owner_id():
             id=ClassifiedAdId(value=uuid4()),
             title="Title",
             text="Text",
-            price=Money(amount=Decimal("10.00")),
+            price=Price(amount=Decimal("10.00")),
         )
 
 
@@ -63,7 +63,18 @@ def test_classified_ad_can_be_created_without_price():
     assert ad._ownerId == owner_id
     assert ad.title == "Test Title"
     assert ad.text == "Test text content"
-    assert ad.price == Money(amount=Decimal("0.00"))
+    assert ad.price == Price(amount=Decimal("0.00"))
+
+
+def test_classified_ad_can_not_have_negative_price():
+    with pytest.raises(ValueError):
+        ClassifiedAd(
+            id=ClassifiedAdId(value=uuid4()),
+            _ownerId=UserId(value=uuid4()),
+            title="Title",
+            text="Text",
+            price=Price(amount=Decimal("-10.00")),
+        )
 
 
 def test_classified_ad_is_immutable():
@@ -72,7 +83,7 @@ def test_classified_ad_is_immutable():
         _ownerId=UserId(value=uuid4()),
         title="Title",
         text="Text",
-        price=Money(amount=Decimal("10.00")),
+        price=Price(amount=Decimal("10.00")),
     )
 
     try:
@@ -91,14 +102,14 @@ def test_classified_ad_equality():
         _ownerId=owner_id,
         title="Title",
         text="Text",
-        price=Money(amount=Decimal("10.00")),
+        price=Price(amount=Decimal("10.00")),
     )
     ad2 = ClassifiedAd(
         id=ad_id,
         _ownerId=owner_id,
         title="Title",
         text="Text",
-        price=Money(amount=Decimal("10.00")),
+        price=Price(amount=Decimal("10.00")),
     )
 
     assert ad1 == ad2