Aside from probably being cheaply made copies- they would most certainly be illegal in the US, though they may not be in your area depending on what your laws are. The only time you can use a laser with a diode over 4.9mW in the US is if there is "fatbeam" or defraction technology being used. To determine the laser's safety the manufacturer must measure and report on the amount of laser light that can enter the pupil at any given point in time. Since fatbeam widens the beam, and diffraction splits the beam, this technology can be used to widen, or split a more intense beam so long the amount of light able to enter the pupil remains below 5mW. Anything above this and the operator must apply for a variance. (in the US)
Some of these lasers look like they may meet those criteria, but I doubt they would carry the proper designations and approvals to make them legal in the US. Are the ADJ or chauvet units in budget? Can you get them where you live? Or, maybe even a more pro laser manufacturer? High quality, higher power entertainment lasers are expensive...