This seems to be one of the best cheap massage guns and has very good reviews and a 4.5 star rating at Fakespot. According to listings on foreign Amazon sites, it has a 16mm amplitude. While I could not find the stall force listed anywhere, reviews say it is quite powerful. This seems to be better than the majority of cheap massage guns, which often have a low amplitude and not much power.
【4 LEVELS OF INTENSITY + 4 MASSAGE HEADS】Choose the speed that best suits your need, and change up the massagers head to more precisely target different body parts and muscle groups. Incorporate pressure of up to 3200 rpm for a percussive muscle massage gun experience into your rapid recovery routine. A heavy duty construction keeps it stable during all speeds.
【Super Quiet】30db low noise, high frequency adjustable,Evieun professional deep tissue massager has 24V brush-less motor and quite glide noise reduction technology that bring high power but low noise experience. You can use it at home, gym,office.
https://www.fakespot.com/product/evieun-percussion-massage-g…
It's quite often sold at a discount, but this seems to be the cheapest it has sold for. This is most likely not as good as the GK2 model, but that one is no longer sold for under $100.
There's a $20 coupon as well so it's just $33.49, got one thanks OP.