Unless its a serious case of mates rates or cheap repairs there is no way thats $2k to repair.
Rear passenger side quarter alone would be more than that to source, have grafted onto the car once the other one is cut off, prepared and painted.
Not to mention the passenger door, window glass, alignment etc.
My 2 cents - dont bite but i dont think its a good move to assure any potential buyer that its a "Maxiumum" of 2k. So if you cant afford to spend the 2k now and fix prior to sale, what happens when joe bloggs buys the car, has it fixed at a price of say $5-6k, and comes to you for reimbursement of the balance? will you be happily handing the cash over? I doubt it.