List is incomplete. Some guns are overpriced (luxe), some guns are underpriced. Not an opinion, i'm talking about your numbers.
Also, good luck updating this; its a great idea but the price drops each year will make this hard to do.
If you ask me, best thing to do is just to browse the electro forum and look at prices. Go through the first 5 pages at least once a week. I go through them every day, or more than once every day.
When all of those prices are in your head, you're that much better off than looking at a sheet someone else wrote.
Word of advice for OP and anyone reading