Personal stamps

We see more and more "personal" stamps on Ebay or other selling places. This one I bought on EBAY. It is a stamp of last year issued with for the stampshow POSTEX, in Apeldoorn, The Netherlands. Don't go to that shows the last 15 years, don't know why. Maybe I see to much that I don't have. Started to collect some of these personals stamps, like them but who knows what are the issue figures? Not that our TNT Mail tells us about their issues.