1000DollarAutos.com is cheesy enough to work. You would have to have a yard full of Registered, Road Worthy Certified vehicles for sale for, $1,000 - $5,000, like the '2 Dollar Shops'. There is no reason this name can not be built into a localised franchise. The idea of purchasing a 'drive-away' vehicle for $1,000 is appealing.
There is only one person on the planet that will give you $1,000 tops for this domain name. The job of the Domainer is to find that person.
regards.matt
PS
Let those other silly names expire. Focus on 1000DollarAutos.com, seriously.