I think you should make a small change to the Bazaar in that it does not load up items until you click on whatever category you are actually looking for. I am high speed and it is only a minor inconvenience but if other people are trying to look at the Bazaar on satellite or dial up (heaven forbid) then loading that first category just bogs them down.
Actually, I would prefer that the Usable Items checkbox be selected by default.
I would prefer that too. Also a sell all option, for selling all your regrents. I had thousands of them to sell but i had to do it one at a time which is extremly frustrating. I know with the bazaar the number of items affects the price, thats why when you sell all they would be sold at the minumum price as if there were already 100 of that said item already in stock.