I've been an avid bicyclist for many years and am really regretting getting rid of some of my bicycles and parts. Lately, I've been particularly regretful that I threw away some old derailleurs I had when I worked in a bike shop many years ago. I had an old english frame with a SEAT TUBE derailleur that you had to reach down and move manually. Have any of you ever seen one or do you know where I might find another? Also, are there others out ther that regret selling bicycles you once owned? I'm thinking that I'll keep all of them from now on.