I am currently PG after thinking we were done having kids... so I didn't have anything either!
I found a convertible crib on sale at Buy Buy Baby... it was $199 and then I was able to use one of their 20% off coupons that made it $160. It is SO nice, and the quality is great.. when I saw it in the ad I was worried it would be cheap due to the price, but it is great. I went to Kid to Kid in Mckinney and their used cribs were more expensive and I didn't like them at all. I did end up buying a really nice Eddie Bauer bassinet, and a like new swing there for really reasonable. You may also want to check out Craigs List.
This weekend is Craig Ranch's big garage sale.. and they have a TON of baby furniture, etc.
Good luck!