I think I'm seeing a theme with the underrated games. They are either ugly or the theme is undesirable.
Road Show came up and without the soren chip I probably wouldn't be able to play it much, but that chip is an absolute game changer. No two games are the same anymore. For only 3.5k, I think it's some of the best bang for the buck.
I would have to agree with all the Baywatch people out there. It's a super deep game with a unique layout that shoots well, and tons of great rules. Similar pricing as RS. Absolutely a steal.
Barracora is seriously underrated. It's one of the most fun games I've ever played and the rules are so deep for a game made so long ago. Nobody ever talks about this game either. The backglass is awesome.