I’d look into this. You can use it as leverage against her to get her to provide a more honest quote. I had my door and rear quarter pulled, bondo’d, and entire side of the car painted for less than that. She IS scamming you, there is no doubt in my mind. I can understand someone wanting to take their car to a trusted mechanic to get work done, but not if they drive a fucking heap. A 7-800 repair bill on a car that is worth maybe 4 grand is ridiculous.