$76 incl. shipping for a KT4 Ultra? Sounds a bit much... Wait, I'll look at PriceWatch.
... Yup, what I said. There's one NEW for $75 at Memorylabs.com including free insured ground shipping:
http://www.pricewatch.com/1/2/5026-6.htm?
You made quite a bad deal

Besides that, it has been used for who-knows-how-long, and you don't know in which condition it is... I'd say, sell it off a eBay again and get the new board for the same price (or pay a little more and get a nForce 2 board).