That seems to be about the going price, the $9.95 one seems to be even a bit cheaper than usual.  Considering they are RPGA items that are only given at tourneys, I'd say they're a good investment, similar to the Adventurer's Guild modules.  I'd say they're even better the AGs because these are glossy, with art and harder to duplicate.  It's only a matter of time until someone starts xeroxing and PDF-ing the AGs.

FYI - Any WotC Premiere Store (which is probably almost all decent sized games stores out there) can order up to four RPGA Retail Kits per month.  The kits include:

1 window cling
2 promo posters
12 terrain tiles
7 promo miniatures
3 spell/effect templates
3 copies of a Green Regent adventure
A bunch of paperwork for running leagues/tournaments

The contents change every month, though they do repeat some of the templates, terrain tiles, etc.  All this for only $10.  If you're really interested in these I'd talk to your local gamestore and offer them $20 to order them for you.  Beats the hell out of eBay and you get extra copies for trade or play.