Hissyfits is a resale shop so you'll never know what you'll find, but when I checked it out there was a decent selection of children's clothes and a small maternity selection. I happened to be looking for furniture and didn't see much along those lines (but they did have a couple of basic rocker/ottoman sets). I only ended up buying a pair of very fairly priced maternity pants and was surprised they ended up being on sale at the check-out register. If I would have known they were having a sale, I might have tried harder to find more stuff. And, BTW, it's a very crowded store and the bathroom doubles as a fitting room.
They had some baby bjorns for about 50% off retail that I would have considered if I could have figured out how to put it on without the manufacturer's instructions. My one and most serious complaint is that I overheard a store employee talking to a customer about car seats. Buying a used car seat is already a little risky and her response to reselling the seat was "We ask that your car seat hasn't been in accidents, but, you know,..." Not a ringing endorsement in my opinion.