Try Carmax. I've sold three cars to them. It's fast, easy, and the price is fair and always more than any dealer would give you.
They would be more than likely. Having the service records increases resale value TO PRIVATE PARTIES. Dealerships are a lot less prone to purchase a vehicle in a private sale. If you can get copies of the service records, you can easily place it for sale on many websites and get way more than the dealership will offer. To summarize: no they wont "buy" it back from you, if they did it would be a fraction of what you can sell it for, and selling privately is ultimately your only option. Good luck!
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