Opp shops = Opportunity Shops? Recycled Clothes.....Trash n Treasure shops? Ummm...does that cover it?
"Opp Shopping" is huge over here, its a great way to get *trendy* clothes without paying an absolute fortune for them.
I have been known to drop a pay packet on a pair of *pre loved* Levi's, at an opp shop I can get the same thing for the price of lunch