I jus purchased a 06 gs300, i drove fine on my testdrive, as soo. As i purchased it, i have been gettin a slight vibration at low rpms, and low speeds, around 20-30 mph, sounds like the rear wants to fall out, idk what to do can i get any suggestions on where to start at?

 

As with any problem you should start with the cheapest solutions first. Check the alignment and such. It could be something as simple as a wheel weight falling out. Or if they put new brakes in the rear, the brake dust could cause some grinding feeling. I'd take it to a shop you trust. But of course don't let them try to take advantage of you.