Also something to note: If you have a loan, figure out how long it takes for them to release the lien and then for your state to release the title.
Example: In Texas (using BOA), it takes BOA 8 days to confirm receipt of the payment. After those 8 days, they will electronically release the lien. It then takes the state 10 days to get you your title (assuming no delays). So that is a minimum of 18 business days till you will be able to sign over a title to the new buyer.
Just something to consider so you can all plan accordingly if private selling