If you want to make it even harder there's a similar company (Plane Tags) and if you get on their mailing list you'll get notices for some truly rare aircraft like various WWII fighters and bombers, some modern military, long lost airliners (Lockheed Constellation, DC-*, etc) and some various unique historic aircraft.

some enterprising and gutsy soul needs to get into Ukraine and see if they can salvage some of the skin from the only remaining AN-225 that was destroyed