There's a local computer place that is selling a used 23" Apple cinema display. Its the aluminum type. They are asking $200 for it. Would it be a good deal or is that too much? It isn't in the best of shape either, it has a small scratch on the screen that isn't really noticeable once its on. The bezel is knicked up in a few spots too. I mainly was considering it to use as a secondary screen with my 27" iMac. I would love to eventually get a thunderbolt display, but just don't have all the funds for that at the moment. Thoughts?