Its not a bad idea, Toyota has by far the largest inventory, but they usually think to highly of themselves to drop the price enough to move vehicles. After them it went Ford, Dodge, Chevy... I don't know if they group GMC in with them or not. Everybody has at least a 60 day supply, Toyota was around 140 day supply not too long ago, so who knows.
Everybody has gas deals out there too, Chrysler has the $2.99 gas for 3 years, which when I figured out last didn't save any money compared to financing with 0% (but that would depend on how much money you put down).
Its definitely a buyers market, and don't let the dealer fool you that its not. They need to move vehicles pronto, and the financial groups are willing to really take a hit to move cars since most are owned by Auto makers/Parent Companies.
Shop around a bit, find a dealer willing to work with you, and budget accordingly. Good luck!