While i agree its possible it could be a scam i checked the sellers other items and they have single WL 473nm handhelds for sale and also 445nm and 405nm units listed and all of the listings have fairly appropriate corresponding prices. Thus the reason i think it could be a legitimate buy as the 473/532/650 is over 500$, the 473nm is around 300 , and the 445nm and 405nm were priced a 6.99$ & 69.99$. Soo ya if you check the sellers other items for sale the prices seem to accurrately reflect the current going rate for similar lasers on other sites.Sorry to be the bearer of bad news, but there's no way that's 473nm. it's probably not even blue, my bet is that it's 650nm (red), 532nm (green) and 405nm (violet) in that. As for drivers... probably a 532nm module with a driver built on, and the cheap constant voltage drivers on the other two. I don't see multiple switches, so there's probably just a tailswitch that turns on all three at once.
473nm you won't find for under $300 for 1mW, or 5mW... unless you find someone with some of these sample diodes from sharp. They were a very limited run that no low quality chinese seller like this appears to be would try it. Even the high quality ones wouldn't really... I think the only folks who did were sanwu, and they ended up killing theirs without knowing how/why. These samples were very touchy and would die for no apparent reason. These things would certainly not be able to withstand a cheap driver.
So that leaves standard DPSS 473nm, where there's no real practical purpose for thus no reason to be manufactured. That's why the 473nm units from more reputable sources are so expensive. I doubt they're making much on them even...
So ya i agree that it may be a scam and is in a host that looks like it would be tricky to fit that many lasers....u never know tho...new stuff hits the market all the time. And i would argue that just cuz theyre on an unfamiliar chinese site doesnt automatically make it a scam, unless im misinformed arent most diodes manufactured in china/japan? Wouldnt people over there would have first access to surplus/discarded malfunctioning/poor quality/manufacturing defect lots or sample production runs that get sent out to companys or were sent out in engineering R&D sample packs or development kits? Regardless i just wanted to throw the link out there for everyone to know about and see if anyone had ordered from would have any input. If i had the money id gamble on it but it being the holidays i dont have the funds. If i get around to ordering off that site ill be sure to post a review and let everyone know if its legit or not and how fast the shippings was etc.