I've bought a green laser on the streets in Shanghai (they're selling them at every corner), and divergence seems to be better than 1mrad as well. It looks little worse than my red, which is about 0.5mrad (measured over 45m/150ft). I've done no measurements yet, however. Note, using a mirror to increase beam distance is valid only if it's an optical quality flat first-surface mirror. There are other quality considerations than just divergence for a laser beam, like bandwidth or coherence length or exit diameter. Possibly the RPL beam divergence can be improved just by expanding the beam to a few mm diameter.
As for prices, I don't know for how much they're buying them (if they do buy them from suppliers - I think they'll rather be working by some commission model), but it's quite sure that the profit these companies are making per laser is on the order of cents. It's all done by huge volume and dirt-cheap human labor.