sandawa,
last month the 502ES started acting weird, even damaging some ofmy cd backups bacause the tray doesn't fully seat down upon closing causing the cd to touch the bottom of the tray. it even skips and does other weird thing.
well last week (after delivering most of my work load), I had the chance (and the time) to do some major work in my 502ES. Alas, it's working like a new cdp, clean, upgraded and most of all, sounds fantastic! no more damage disc, no more skipping, just pure music. I probably won't trade this one anymore.
anyway, if you do find another model in good condition, I'd like to have one more just to satisfy my itchy fingers.
Thanks!