I definitely would not trust them.

Unless they accept some form of escrow that is trusted, there is just simply too much risk in purchasing these equipment from them. Yes you'll get offered good prices but in the past there has been a lot of scams that pose as legit shops that sell mining equipment, and they will run with your money.

I would definitely recommend buying from a trusted source, either on forum or off forum. If you're doing it on forum, use forum escrow. If off forum, use something you can charge back with if something goes bad.