I do keep a full record, and it shows that singles always are a better buy, and that prices do fall away if a recone is needed for example.
Well understood, i'm a "bottom feeder" in this realm. I'd love to be able to play with the minty pairs, but that will have to be reserved for another lifetime in a better paying profession.

Your record keeping is valuable and appreciated, keep up the good work.

I don't suppose you've kept track of variable state(tube) Altec amplifiers have you?