HP 67 programming?

[Thomas Okken]

It varies, I suppose. I have a 67 that I bought fairly cheap ($110 IIRC, not counting the card reader repair, which I also had done) about 10 years ago; it's in good shape but some of the keys do feel a bit softer than the others, the h key in particular. It's clearly been used pretty heavily. Works fine though.

At the other end of the spectrum, I have a 41CX that I bought recently and paid over $300 for, and if it weren't for some slight wear on the feet, I would assume it's never been used. It is spotless and the keyboard is perfect and wonderful. It was advertised as being in great shape, and with a money-back guarantee, so it didn't feel like much of a gamble.