You can usually get it for $85 with a 20% off coupon, and there are a plethora of bolt-on parts to fit it up to your bike as well as performance parts.
Good engine, especially for around a hundred bucks. I had the old 79cc Greyhound, am still running a 99cc Predator on my Panther, just bought a 79cc Predator for a current build...
... and replaced the engine on my son's snow blower with a 212cc Predator. All started easily, ran smoothly and never gave a lick of trouble in any way. What more can one expect from an inexpensive motor?
SB