I'm looking at getting another D50 (because I just love mine) to have for back-up. Adorama and KEH always seem to have 1 or 2 of them in stock for the last several weeks. Has anyone bought a used body from either of these and could you offer any feedback? I know a lot of people rave about used glass from KEH and not-so-good reviews about Adorama's used department. I appreciate any feedback.