(a) When obligation unenforceable.--An obligation of the buyer of a motor vehicle under an installment sale contract that was consummated in this Commonwealth is not enforceable in this Commonwealth if:

(b) Cancellation of contract; release of liens.--Upon payment or tender of payment to the holder of the principal amount financed under the contract described in subsection (a), less payments on account of the obligation exclusive of down payment which had been made previously, the buyer under the contract is entitled to:

(c) Applicability.--This section shall not be construed to prevent the enforcement in this Commonwealth of an obligation arising from the sale of a motor vehicle made outside this Commonwealth under an installment sale contract entered into or executed by the buyer outside this Commonwealth, whether or not the buyer was a resident of this Commonwealth at the time the buyer entered into the contract.