Skinny chicks always make out like bandits in thrift shops, and the Vegas Buffalo Exchange is no exception. They always have tons of great stuff for size 0-2, XS, shoe size 6-7. Sometimes it pays to stop growing at age 13.
I heard that a lot of the clothes in this particular Buffalo Exchange are overflow from the LA stores, and given the merch's general trendiness and label consciousness I believe it. I've found everything from Ralph Lauren jackets to Betsy Johnson party dresses, and so many Michael Stars tops I started to think they were an exclusive dealer.
Every time I have a longish layover in LV I stop at Buffalo Exchange, and I've never left empty handed!