u can use any site because it is impossible to be cheated while selliing or buying of T$/W$ the only thing that might be different is the time taken for the transaction
Don't use sites that charge for a trade. Just go to either our w$/t$ marketplace, or go to 2+2's bigger one. You'll get a pretty good price. I'm not sure about $w, but I know people buy $t for %99.5 over there.
it is like tournament dollars only for special events like WPT,wsop,PCA those kind of sattys
u cant use them in cash games or regular tournaments + snga