If you are using collateral, you can select any asset that both parties agree upon. The collateral can also be multiple assets or even a class of assets up to a certain value (businesses sometimes use inventory as collateral). Therefore, the value can be any amount that the two parties find agreeable. However, if the lender recovers more than the amount owed, he or she does not keep the extra. Instead, that would be returned to the borrower. Therefore, it is typical to match the value of the collateral to that of the note.