hey there peoples

What is a good FR Ht for my friend? He's looking to spend as little as possible, while still getting a nice bike...but he can spend up to around $500. I thought of the p. 2, stp 2, kona scrap/stuff/other ones, banshee scratch, titan, steelhead, sasquatch/hun bikes, any others? Most would have to be used, obviously. Thanks.