This is a usually touchy subject on eBay Discussion Boards. Good thing you asked here rather than there.
Honestly, I found several different brands to "look" for just by reading the Clothing, Shoes & Accessories board and the Shoes, Purses & Accessories board over at eBay.
People post their thrift finds (usually a lengthy list) and their "Woo-hoos" so just by reading those I've expanded on what I know will or won't sell for a profitable amount on eBay.
Some brands I've never heard of or seen (Issey Miyake), some I'd never heard of but found and sold (Misook) and some I knew but had been passing over (FLAX).
Takes a little research but I tell you, there's a wealth of information for the taking on those boards.