its because you want $4500 for a 178k expedition, whether its had a new motor not theres still 178k on the body and transmission suspension etc... and there are newer ones with lower miles going for less, i sold my 98 exp eddie bauer with 98k og miles for $4400 and it was almost flawless. knock a grand off the price and you might start getting offers, either way its hard to sell older v8 suvs right now be patient with it and someone will eventually pick it up.