well, after many many times in this situation.....
Here are my thoughts. have had rare machines before, that I have kept, or bought locally on the ONLY principal that they are rare, and I have many that I will never sell because not only are the obscure, but they are treasured as well.
My point is, every time I have bought, or found a machine, and kept it ONLY because, it has not brought me any true happiness, and has left a empty aftertaste in my collection. A rare machine is cool, but I found that they are not worth anything to me, unless I am in love with the machine in question in the first place. So if you are not in love with it, and don't find your self overly proud over its presents in your collection, let it go....and let that money find you something that you DO really really want, that makes you bubble with pride, and joy!=)