No, it's not my only Amiga but it's the one I've spent the most money, time, and effort on. I've overextended myself in the past few months, not just on Amiga stuff though, and the wife says something has to go. I'm keeping my A1000, A500, and A1200 as they are mostly stock.
As to the actual worth I'm not real sure. I'm basing my price on what I have invested. I know some of the parts you just can't find for sale. The hard drive is the one I just bought from AmigaKit.com, the best Amiga vendor. :)Trust me, I DON'T want to sell it! This one was my pride and joy!