[sweetjazz]

Reads are important here. I have certainly have raised the river in similar spots for value in low limit games (but this was back when I played on Party and people were really bad). The whole hand doesn't make a lot of sense, you certainly can't fold, but I don't think you can get much value with a raise here *without a read to the contrary*. That's the case even though CO has A8 or 87 like always here (and calls when MP doesn't 3bet the river). So I'd call, see what MP has, and try to figure what distorted logic he was using when he played his hand. (Although if he shows something ridiculuous like QJs for the backdoor flush I will first snap my monitor in half.)