Underused is a word.
There are a couple of reasons that you don't see more entries:
1. It takes time and effort - not a lot of people are willing to do it.
2. The user integration is broken - if you don't already have priveleges, you need to request to be manually added. The best way to do that is with a post in the site help / comments / suggestions area.
If you want to add some stuff, send me a PM and I'll get your account set up for it.
As to the condition of the razors - restored or unrestored doesn't matter as long as they are in an unaltered state.
So for restorations - take the rust off, clean them, etc... If you change scales or hardware, then don't put them in the database. We want manufacturer original stuff.