Here are some better links---the one posted is extra large size page ---probably a cell phone app link not a computer link.Very nice, awesome price... Do you have a link to their page on those where they are selling them? I am not sure if you mean OptLaser or OptLasers.com
See several listings here: Wholesale Market - Buy Best From Wholesaler.alibaba.com | Alibaba.com
and this link:
Factory Price Yellow Laser Outdoor Holiday 565nm Yellow Laser Diode - Buy Yellow Laser Diode,Yellow Laser,565nm Yellow Laser Product on Alibaba.com
That the only manufacturer on earth in 2018 reporting on or making 565nm and 575nm "lasers" in this company and they sell them @ $24-$30--meaning the cost what to make $10 maybe? Does not add up or ring true.
Low cost LEDs are commonly available in 565nm and 575nm and the manufacturer of these "laser lights" says the device they are selling is either a 3W or 5W G10 socket HID "SMD5730" LED device depending on which Alibaba page/advert.
Maybe they are doing something like the Wicked Laser "Phosforce" and driving an LED phosphor with a laser diode or they are using what they say they use --a 3W or 5W SMD5730 LED like many automobile LED lights do and have found they can collimate a low power beam that looks like a laser?
Keep in mind that a real lab type DPSS 577nm laser is offered by CNI and they cost $4500 for a 30mW see: https://www.ultralasers.com/proinfo.php?productid=946&cat=211&page=1&featured
If it sounds to good to be true it usually is----- I wont believe it is a DPSS laser until proven to be true----someone has to take one fully apart and see/show what it is.
Remains to be seen what the $30 retail price products really are and are not.