ive heard rayfoss has been having problems with shipping and returns, but i went to o-like and they are kinda expensive (for me, dont know your situation monetarily). compared to rayfoss who is sorta discount prices for lasers.
If you are in the USA, you will need to choose between o-like or rayfoss. If you are outside the US, DX has red lasers too, but won't accept US orders for over 5mW lasers. If you are non-US, the DX red dilda (old style) is available at a good price. This forum, btw, is a good place to cure any lack of knowledge relating to laser building. Lurk here, read, search, and start accumulating parts. You'll be a laser builder yet. Start with a simple red or bluray labby in an Altoids tin or similar to let you get the hang of things. A self-made LM317 driver, LOC or PHR diode, aixiz module, and batteries could cost less than an import laser, burn just as well, and give you the satisfaction of knowing that you can build a laser.