Honestly, I have seen that exact type of hit and damage. It's closer to double what you were quoted for bodywork alone, not including damaged mechanical stuff.
Part the car. You'll get probably 5K for the motor alone. Just trying to help you out, not threadcrapping. GLWS
Imola Red M5 | Imola Red InteriorPast:
M-Audio, Power Sunshades, GT Exhaust, Custom BC Coilovers, 19x10 + 19x11 Rial Dayonta Race, Michelin PSS
'01 330Ci Titanium Silver on Coral Red
'96 328i Jet Black on Black