What you'll need to find is the market price, which is what others are actually paying for that car in your area. Depending on the popularity of a car, the market price may be higher than MSRP, or even lower than invoice.
What Others Paid For Car >> 2018 Honda Ridgeline Performance | U.S. News & World Report

What Others Paid For Car >> 2018 Honda Ridgeline Performance | U.S. News & World Report

One other thing to watch out for if you do rent a car (with or without rental reimbursement coverage): be careful to decide whether you really need the insurance on the rental car. I know another person that did have the rental reimbursement coverage, but also got insurance when renting the car (it happens automatically unless you reject it on the rental forms – a good scam for the rental companies).
What Others Paid For Car >> Gucci Mane & His New Ferrari 812 Superfast

What Others Paid For Car >> Gucci Mane & His New Ferrari 812 Superfast