why is a 780 worth less than a 680?

Cause it's a 4gb 680, they're worth money cause of hackintosh reasons and they are rare.

Geez, 90 for a 780 ?

I wish prices were this good here..

i have a 780 Ti Asus DC-II, i have no idea where to sell it. 

I usually buy and sell used stuff on r/hardwareswap. Not really a fan of ebay tbh, at least selling stuff there.

oh Ebay also got bought and shut down in India.