Would you like some good advice? Don't sell video cards.
Very competitive on eBay. Your best option is to find an online retailer and see if they will give you a deal on like 50 of them. Then maybe you can sell them.
You have to have about 10,000 to invest if you want to make a profit on eBay in computer products unless you buy liquidated items.
But even Liquidation.com is becoming a retail outlet as the auction are going for insane pricing and your lucky to make a profit from.
I did see 500 pieces of memory go for 14,000 dollars. thats not bad but do you have 14,000.