I wan't to purchase some items from the shop but it says there sold out. I know people sell thins for lower prices but how do I get to that page?

Do you mean the items board? Here's where the majority of toribash buys and sells their items: http://forum.toribash.com/forumdisplay.php?f=64

Im not sure, I mean how do I purchase items like The thing that follows your hand for cheaper.

I thought people have stores and sell it.

You mean market? That thing is 'reconstructing'. Better to follow the link that Firebolty provided and just post there what u need and how much u are willing to pay. Someone will sure bargain.