Nobody can give you that answer. Used cars' depreciation governs their
values; their actual mileage vs. "normal" mileage for their age (about
11K / year) is an adjustment to the depreciated value - about $.12/mile,
less as the car ages.
If you're lucky and the market is reasonable 50% x $29,000 = $14,500
plus up to $6,000 for very very low mileage - but only for the buyer who
wants a 5 year old car with only 5,000 miles use.
Suggest you drive it or sell it.