You didn't provide very much specific information but my guess is that you have a $1 Sacajawea coin. Demand for them was low in 2007 so they were only issued in mint and proof sets or special bulk packages rather than for circulation. Still, some of them are broken out of the sets and spent.
If you got one in change it's now a circulated coin with no added value.
If it's in its original packaging it could be worth a couple of dollars at retail but dealers have tons of them so you'd be unlikely to get even that much if you tried to sell it.
The 2007 Acura RDX has 38.7 in. of front head room.
The 2007 Audi A8 has 37.3 in. of front head room.
The 2007 Subaru Impreza has 38.6 in. of front head room.
The 2007 Toyota Avalon has 38.8 in. of front head room.
The 2007 Subaru Legacy has 39.5 in. of front head room.
The 2007 Audi S6 has 37.5 in. of front head room.
The 2007 Volkswagen Touareg has 38.7 in. of front head room.
The 2007 Mitsubishi Outlander has 40.3 in. of front head room.
The 2007 Toyota 4Runner has 39.7 in. of front head room.
The 2007 Audi A3 has 38.1 in. of front head room.
The 2007 Subaru Forester has 39.8 in. of front head room.
The 2007 Cadillac SRX has 40.3 in. of front head room.