2x1 GB RAM - $5/stick
Battery - $15 (it's a few years old, but it still holds some charge, as I haven't really used it; good as a "UPS")
Screen - $30 (1400x1050, still functioning)

Prices negotiable (reasonable offers, please).

Basically, my 600m's motherboard seems to have problems, but the parts should still function. If you have a 600m and are looking for spare parts, it would be a great fit.