Accidents looking for a place to happen who don't know any better of anything about eye safety is not a place to market hand held lasers. Maybe with LEDs instead of laser diodes the might fly as a curiosity among those crowds.
Is surprising your "selling" suggestions re: dangerous lasers, ignore completely any consideration of US laser laws and eye safety of any kind + legal and liability implications of doing what you suggest? Yes they are interesting in a Pez Dispenser inspired way and would be attractive to kids with $s large enugh to buy one but...
Laser Hazard--Eye Safety and potentioal for eye damage the primary #1 concern.-- not selling kids very dangerous to play toys to shine at others endangering thier own and the eyesight of others.
The Chinese get away with it because they hide in and behind China and smuggle illegal to import laser pointers into the USA with false Customs declarations. Unless 405 nanoMatt wants to make models that output 5mW or less marketing them as a business is not a good idea.
PS Nothing >5mW can be listed on eBay regardless of output power. Leser poniters on eBay all say 5mW or less, if not Ebay removes them as quickly as possible.
In USA US FDA laws, rules, and regualtions prohibit any hand held lasers over 5mW for just that reason.
"21 CFR 1040.11(b) and 1040.11(c), limit surveying, leveling, and alignment, and demonstration laser products to Class IIIa. This means that pointers are limited to 5 milliwatts output power in the visible wavelength range from 400 to 710 nanometers. There are also limits for any invisible wavelengths and for short pulses. Pointers may not exceed the accessible emission limits of CDRH Class IIIa or IEC Class 3R."
https://www.fda.gov/radiation-emitt...rtant-information-laser-pointer-manufacturers
FYI: have a look at this Laser Hazard Chart:
https://www.lasersafetyfacts.com/resources/FAA---visible-laser-hazard-calcs-for-LSF-v02.png and here even class 2 and 3 1mW and 5mW can cause eye damage
https://www.lasersafetyfacts.com/
For comprehensive all aspects of laser safety info best web site is
https://www.laserpointersafety.com/