Bjjhq.com has some deals, mmawarehouse.com
Before you start buying gis or rashguards, find out what the gym's rules are regarding them.
Some schools are strict and only want their stuff to be worn, others don't care as long as no other school's patches are on them.
Your gym may have decent deals, too.
Ask around about different gi brands.
I have a proma (crazy stiff), otm (decent I guess), and gameness (my preference right now and we get deals by buying at the factory)