That $7300 is just their first low-ball offer. They do that to feel out their clients. Make it clear to them that that is an unreasonable offer. If you know the car is worth more do some research and present it to them. If you have a valid case they wont be able to argue with you.

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1963 Ford F100 - Cummins Swap?
1985 Mercedes 300SD - 210K
1992 Ford Festiva - 92K
2001 Ninja 250 - 8K