I would think about what I needed to do in order to prove credibility. I'd try multiple things, set up multiple situations, cause problems only to have to try to solve them in different instances...If I wanted to start something like what Ben is doing, I'd be busy researching specs, stats, warehouses, locations for adverstisement, building a website if not just to advertise and set up a contact location, but to show what can be done and what has been done by me. I would start basic, with something I knew I was more than capable of, and be able to keep control of that situation before going into a more advanced field I've only researched/experienced little of. I would have to be experienced in something before I'd want to be stupid enough to try and sell/service/guarentee it. I do some basic stuff for my neighbors, family, friends as far as networks, fixing, OS's, hardware upgrades, system builds...but I always list options, pros/cons because there are to every component and situation and choice, honesty is a very good approach, because if you're dishonest, it will bite you. Pretty much if I started, it would be on a first come, first serve basis, let your customers advertise for you. If you make them happy they will tell others, if you make them upset, they will tell everyone. So you do basic things like upgrades, basic installations, things that you are very able to do, and then let the word get out, you'll do those same things, but may run into a few bumps in the road to notch on for experience/new solutions to different issues. Then buy different equipment if only to test the hell out of it, buy stuff you know you want to sell/service/guarentee...some of the stuff you'll buy may be a crapshoot..and I wouldn't sell anything that was not a guarentee. But I'm so busy with life and my real job (GM Technician) that I really only have time anymore for family stuff and of course my own system. I don't do online sales/service anymore...but it's a very lucritive option if you get good at it and want to do it! And well, that's my answer. Get good at it, via research, then experience, buying power and keeping stock helps if you want to sell items. Start small, start with people you know, let them advertise for you, hell that's half the work...if all you gotta do is wait for calls, you're in the right direction. If I can't do it, I wouldn't sell it or offer it, that's for damn sure. But if you wanna do something, make sure it can be done right the first time, many times...very important.