I think you have allot to learn.........(not trying to be rude here..)
but some of what you said above is just excuses.....
z28 mentioned about putting up ads, spend the 20$ to do it....
Also, calling a dealer or a place that sells bikes would have been the first place I would call just to see how they would pay for it. If the price you hear is not nearly as close as what you would have expected, then just go on over and have a look at howmuch es selling similar year and condition models for. That will give you asn idea of what you can expect to fetch for it.
eBay is not that bad.... I thought the same as you before but there are some features of eBay wich you probably dont know of yet and thats why you are scetchy about using it. Get familiar, start an account and see what options you can chose while building up an item for sale, then reserve jugement to if it realy is as bad as you make it out to be.
Allot of the things you describe are all things you will slowly learn that are tiny details in your life and ther are much larger things to worry about. A car is not an investment. No mater what it will break down some day. There is no perfect car, and at your age, any POS will do. You call the GA a POS because it left you on the side of the road, who cares. You had a LEMON. Not all GA's are like that. You'll prbably realize that almost any car that you will own in your life will breakdown or get you pissed off at one point or another. Learn to deal with it and see how thoe god darn thing works by working on it yourself. Then you will understand the nature of a car and breakdowns..... no car is suceptible to this.... not even a nissan 240 sx or zx... my friend has one and has had one for the last 6 years.