“Our best cars. Your best offer”. That’s the tagline of GM’s newest promotion the company hopes will help them get back to profitability.  For now it’s only be available for California residents because of GM’s lower market share there, which is around 13.5% compared to the national average of 19.5%. It’s a bit surprising that this is the first time that an automaker has tried this out, so kudos to GM for being the first. Jump to see how you can participate — you might be able to score a G8 for super cheap! [Source: NYTimes]

Selling cars through Ebay is certainly not a new concept, as dealers and individual sellers have been using the website to move their cars for many years now. But this promotion bands 225 dealerships together to make a coordinated effort for Ebay sales.

Cars will be listed with a “Buy It Now” price instead of the usual auction format. Potential customers will still be able to lowball the dealer by sending their offers through Ebay. Of course, everyone’s still expected to physically come to the dealership to examine the cars and take test drives, but this promotion is expected to facilitate everything leading up to a visit to the dealership.

The intial goal is to have 20,000 cars listed on Ebay starting today, August 11th, and run until September 8th, 2009. Check out what GM has for sale. gm.ebay.com.