I have had buyer's remorse on several occasions (after buying an Intel X25m for example, even though it was a good upgrade), but is there such a thing as 'seller's remorse'?
When I lost my job, I sold my Unicomp Customizer for practically nothing and decided to use my Cherry blue board, which I later modified to browns. After a few months I bought another blue board, and now I am considering buying another Unicomp. Am I crazy? I will probably keep using the Cherry brown board but I still like to have the other boards around and it is for this reason that I considering spending more money. It is not even curiosity any more, as was the case for my Alps-buying splurges last year, because I know what the keyboards feel like, I know what they sound like, and I know that they weren't my favourite!
I have decided that I am not going to sell any more of my keyboards because there will be a point in the future that I will long for it again.