Newbie Investor Question on Lease to Own and Getting Financing

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I’m new to this so I hope this doesn’t sound stupid. Two years ago I rehabbed a house and started renting it out with a rent to own contract. We agreed upon a sale price for when the buyer is ready to buy. The reason they wanted to rent is because their credit score was on the borderline of being able to get a decent interest rate and they wanted to improve their score before buying. Anyway, the sale price we agreed on is now somewhere between 10-20k over market value of the home. My question is this, if my renters are ready to buy, will a bank give them a home loan for a price that much above market value? Or do will banks only give loans for prices closer to the appraisal value?

Thanks for the help, sorry again if I'm clueless.