Would you build your own parachute from recycled pieces of cheap cloth sewn together? Well maybe you could and it would be safe if you were careful, but would you buy one from somebody else and trust their craftsmanship? Nothing wrong with inventing, just destroy it when you are done with it, if it doesn't destroy you first. Selling it on craigslist, no.

I see those Bar Stool Racers on Craigslist, like that is a good idea. Going 30 mph with your head 5' off the pavement. At least the mini bikes are close to the ground when you bite it.

 

http://lancaster.craigslist.org/mcy/1610430892.html

 

ive got 2 quads and let me tell you, i wouldnt wanna try and stop either at any good speeds. they both have great brakes but i dont think theyd be able to pull a bike like that trike to a stop over 60 mph effectively

 

http://miami.craigslist.org/brw/mcy/1610768701.html

He wants how much?