I have bought a few small items from them, but not paint. However they are an automotive supply store just like your local bodyshops buy from! I would stick with the PPG Concept Urethane or Delstar Acrylic enamel paint and not the lower line "used car lot" paint as the longevity and color should be better.IMO
By the time you pay for their paint and the shipping you could probably get it nearby at your local bodyshop supply store for similar cost!
Brad