Hula Girl Mug - United States Line

I found at a Good Will Store a Hula Girl Mug that apparently comes from the United States Line when they had the Hawaiian cruises. It is part of a group of mugs sold on the ships. The last entry from this website was in 2005 when this mug and others were being bandied about. I need some help if someone could give me a ball park on what these mugs are worth! Thanks from a rookie in the Tiki world!!!

From the Ooga Mooga website:
http://www.ooga-mooga.com/cgi-bin/all/mug.cgi?mode=view&mug_id=3412

Here's a completed auction for one that was offered at $12.99 with no takers:
Hula Girl Mug

I think a more appropriate value for these would be in the $5 - $7 range. Not too highly sought after, unfortunately, as they are a more recent mug (circa 2000-2001) and the production value wasn't super high. I'd keep them and serve drinks in them.