First of all, I would like to remind you of the pronunciation, it is pronounced “Liweis”, in case you should ask the seller. In my experience, the OMG chain (which is also an acronym for Oh My God) has affordable prices starting around $15. You can also find pants from other brands there. Sure, it doesn't look like a Prada boutique, but for bargain hunters it's the place to be.
There are six branches in New York of the OMG chain, see the map for more information.