There are light scratches, as it's been kept in a travel CD case, and also just the fact that it's 2 years old. At least in my own personal cd players, every track plays without skipping.
You mean how to bid? Just keep an eye on this if you want it - when it gets closer to the end of the auction (7:07 on Friday) check back to see if you've been outbid. If you still want it, guess on a higher number than the one that's shown until you get the highest bid. The current highest bid is not actually shown, so it can be tricky to get the leading bid. I'm new to this myself as well, so I can't explain all too well. Take a look at the listia help page for more details.