Bat-cave Mailorder offers lots of obscure band t-shirts. I placed an order in March and I've only just received it!! The shop is from Poland, and I know that Poland mail is very slow (I have a pen-pal from Poland, and our correspondence usually takes a while).
One thing I don't like about this shop is the lack of communication. I've send three e-mails to the store, asking where my order was and I did not receive a reply!
I seriously don't care that my order took 3/4 months to arrive, but having no communication is really rude and unprofessional. I had no idea if my order had been sent, or if I had wasted $50.
Overall, I'm a bit disappointed in this shop. The lack of communication was a deal breaker for me.
UPDATE 14/04/14: It's been a while since I got my shirts. I've washed them a few times, and they're holding up well. They're also still nice and soft. I'll take back my old review and say that the shirts a okay quality. It's the long shipping time that you have to watch out for, but I guess it's coming from Poland so it'll take a long time.