I don't want it - I have two STEs that work (one is a one-off black STE) and a bunch of spare Mobos.
CD-ROM you say? That helps, and it's in a PC case, so the Germans will love it :)
You could probably command around £200 for it quite easily...not a lot I know, but I got £800 worth of software (and a 1040STF) from eBay last september for £35. It's not a great time to be selling Atari computers. Unless they're falcons or Portfolios...