As most here, I played a ton of D&D and a kid. I started collecting a year or so back and focused on my favorite module,
B2. I kept finding listings on eBay at $30+ (there are several out there now close to $100) and wanted to know what they were actually selling for. Being a geek, I decided to make calls to the eBay api and pull the results down. Once I had them loaded to a database I reviewed each one and assigned a grade. NOTE - I am NOT an expert on grading, but I did my best to stay consistent.
I found the results interesting and figured I would share. I'm not sure where I'll go next...thinking I'll complete the B* series or maybe look at rule books.