there are a bunch of DS (new) shoes for sale there, and some stores use eBay to sell leftover stock, sometimes from a few years back.
any retailers with NSB accounts are going to charge $$$ for older shoes.
i'm near NYC so I check out a few local shops, flight club, atmos, supreme, ... there's probably a few stores in miami, N-SB accounts are pretty hard to obtain, only a few dozen stores in the world have them. Honestly, I haven't been impressed with much of what nsb has been putting out these past ~2 years.
Few nice pairs since, but I've stopped buying over a year ago...priorities...