Under PA Insurance Regulations, following a collision, you are entitled to be covered by your insurance (if you purchased collision coverage) or the at-fault driver's insurance for the actual cash value of the vehicle.
Here is a helpful site -- Kelly Blue Book-- for valuation:
http://www.kbb.com/
If you would like more information, feel free to contact us.
Mayerson Schreiber McDevitt, P.C.
www.mayerson.com
610-948-4800