These are probably even more collectible as they don't produce them anymore:
Quote:
Collector quality stamps were printed from 1991 through 2006. Starting in 2007, the Commission switched to an electronic Point-of-Sale licensing system (POS). POS licenses indicate if a stamp (permit) was purchased, this eliminated the need for printed stamps. The Commission does not sell past year stamps, they may be available on secondary markets
Here's a link to the ones that have been issued:
http://fishandboat.com/trstam.htm