I haven't purchased anything from Alibaba so I can't speak to the reliability of that site.

But regarding the projector that Optlaser builds, I think you'll be quite pleased with it. If I were you, I'd contact Optlaser directly and see what sort of price they can quote you. I think the suggested retail price for their 3 watt "mini club system" (the PD-3000 RGB) is actually less than the price listed on Alibaba...

Adam