There's a Salvation Army store on 46th between 10th & 11th, I believe. There is one on 8th around 23rd or so too, that's pretty good. Stay away from that "Cheap Jacks" store because the cheapest thing in there would pay my rent for a month.
The Flea Market on West 39th/9th Ave on the weekends all yr long. The lady with the huge vintage clothing/accesory section is absolutely FABULOUS! Very high end retro and new CHEAP fabulousness!! I'm serious~ ck it out!!! You'll go Crazy/!