Just imagine the red offboard up here. I'll create it Real Soon Now...
Yes, I know a proper 18XX tile should have a tile number.
suggestion: create a geeklist where every vendor would list all of the games they have for sale. Sort it alphabetically.
That way people looking for game X can see "stocked by FunAgain who expects copies back on Friday" or user comments like "I'd never heard of this but bought it and it's a lot of fun with at least 3 people. "
There would be a lot of churn as vendor stock changed but it would make quick raids for a single game a lot more effective.