Parts exchange brainstorm

After getting lots of interest from an earlier post about starting a parts exchange here - it is now time to start figuring out how to set it up best for everyone that desires to potentially use it one day.

Tell me what you would like it to both include and exclude, and any other details you can think of to create an exchange system that is efficient and beneficial to all.

This is for you guys...  all the PowerPC users that need help getting certain parts, whether the reason be geography or lack of money.  Lets make it the best it can be.

One thing I can tell you for sure is that you won't have to post personal details like address or full name to anyone but the person you're sending or receiving parts with.

Now lets fill the comments up with great ideas!