diff --git a/src/components/cards/CardDatabaseBrowser.tsx b/src/components/cards/CardDatabaseBrowser.tsx
index 3db582a..042a384 100644
--- a/src/components/cards/CardDatabaseBrowser.tsx
+++ b/src/components/cards/CardDatabaseBrowser.tsx
@@ -1,6 +1,6 @@
 import React, { useState, useEffect } from 'react';
 import { useQuery, useMutation, useQueryClient } from '@tanstack/react-query';
-import { tcgApi } from '../../services/tcgApi';
+
 import cardDataService from '../../services/cardDataSources';
 import type { Card } from '../../types';
 
diff --git a/src/services/cardDataSources.ts b/src/services/cardDataSources.ts
index fe28f82..b165a83 100644
--- a/src/services/cardDataSources.ts
+++ b/src/services/cardDataSources.ts
@@ -70,8 +70,8 @@ export const mtgService = {
         toughness: card.toughness,
         image_url: card.image_uris?.normal,
         stock_image_url: card.image_uris?.normal,
-        current_price: card.prices?.usd ? parseFloat(card.prices.usd) : null,
-        market_price: card.prices?.usd_foil ? parseFloat(card.prices.usd_foil) : null,
+        current_price: card.prices?.usd ? parseFloat(card.prices.usd) : undefined,
+        market_price: card.prices?.usd_foil ? parseFloat(card.prices.usd_foil) : undefined,
         verified: true,
         createdAt: new Date().toISOString(),
         updatedAt: new Date().toISOString(),
@@ -113,8 +113,8 @@ export const mtgService = {
         toughness: card.toughness,
         image_url: card.image_uris?.normal,
         stock_image_url: card.image_uris?.normal,
-        current_price: card.prices?.usd ? parseFloat(card.prices.usd) : null,
-        market_price: card.prices?.usd_foil ? parseFloat(card.prices.usd_foil) : null,
+        current_price: card.prices?.usd ? parseFloat(card.prices.usd) : undefined,
+        market_price: card.prices?.usd_foil ? parseFloat(card.prices.usd_foil) : undefined,
         verified: true,
         createdAt: new Date().toISOString(),
         updatedAt: new Date().toISOString(),
@@ -155,8 +155,8 @@ export const mtgService = {
         toughness: card.toughness,
         image_url: card.image_uris?.normal,
         stock_image_url: card.image_uris?.normal,
-        current_price: card.prices?.usd ? parseFloat(card.prices.usd) : null,
-        market_price: card.prices?.usd_foil ? parseFloat(card.prices.usd_foil) : null,
+        current_price: card.prices?.usd ? parseFloat(card.prices.usd) : undefined,
+        market_price: card.prices?.usd_foil ? parseFloat(card.prices.usd_foil) : undefined,
         verified: true,
         createdAt: new Date().toISOString(),
         updatedAt: new Date().toISOString(),
@@ -204,8 +204,8 @@ export const pokemonService = {
         toughness: null,
         image_url: card.images.small,
         stock_image_url: card.images.large,
-        current_price: card.cardmarket?.prices?.averageSellPrice || null,
-        market_price: card.cardmarket?.prices?.lowPrice || null,
+        current_price: card.cardmarket?.prices?.averageSellPrice || undefined,
+        market_price: card.cardmarket?.prices?.lowPrice || undefined,
         verified: true,
         createdAt: new Date().toISOString(),
         updatedAt: new Date().toISOString(),
@@ -256,8 +256,8 @@ export const yugiohService = {
         toughness: card.def?.toString(),
         image_url: card.card_images?.[0]?.image_url,
         stock_image_url: card.card_images?.[0]?.image_url_small,
-        current_price: card.card_prices?.[0]?.amazon_price ? parseFloat(card.card_prices[0].amazon_price) : null,
-        market_price: card.card_prices?.[0]?.cardmarket_price ? parseFloat(card.card_prices[0].cardmarket_price) : null,
+        current_price: card.card_prices?.[0]?.amazon_price ? parseFloat(card.card_prices[0].amazon_price) : undefined,
+        market_price: card.card_prices?.[0]?.cardmarket_price ? parseFloat(card.card_prices[0].cardmarket_price) : undefined,
         verified: true,
         createdAt: new Date().toISOString(),
         updatedAt: new Date().toISOString(),