I would agree with Elevick. The Denon DVP2200 is a bargain, and a great player at the price you should be able to find one for: $200 - $250 used.
Used universal player
Among some of the universal players I've been suggested is the Panasonic F87 which I like(I've found this online new). How about some advice on a used player($100-$200 range) that will not have to be upgraded or modded right now to be a good fit in a 2 channel system. I'm gonna be using an Onkyo TX 902 to power it right now. Single or multiplay examples will be considered.