well I have done lots of buying/selling/trading in my life and none of this current stuff with 3D printing has even come close to some of my troubles LOL.
one guy was a neighbor of mine and a coworker at a new job I moved there for and I put out the word at work I needed a dog house and my new job didnt pay much. this guy told me about a neighbor of ours that was moving and had a dog house for free, so I got another coworker to go with me in his pickup and get it. a year later dog was gone so I sold the Dog house for $20 to somebody. the guy that had told me about it a year earlier was very mad saying I should have split the $20 with him since he told me about it. LMAO can ya believe that? gee wiz there is just no pleasing some people. its not like I got rich off his invention. some people are jelous of anyone that makes any profit off anything they didnt when they could have. thats why I never tell anyone when asked how much I make in salary, sales, profits etc. only bad can result from it, no good. most things printed on 3D printers and sold will never make anyone rich or even self supporting income after paying utilities, materials, repairs, investment in tools, labor/time etc. it leaves very little profit to pay Royalties from or share.
Solidoodle 2 with Deluxe kit cover & glass bed with heater. and 2nd board SD2 used not 3rd and alum platform not installed yet still wood. also need cooling fan installed to board. use Repetier Host couple vers. Slic3r also have all free ware STL programs