if you really need to sell it then price it accordingly to your market, sounds like you already know what dealers charge so keep this in mind. Most buyers would go to the dealer and negotiate some warranty extension to make sure the car is sound plus if there is some hidden issue dealers will work with you to fix it at their cost (I did it and it was worth). Also keep in mind that mods are only worth to you and not to the new buyer, if anything they are deterrent as in most cases it indicates the car was raced a lot and abused (not saying most will abuse but there is always that percentage that do and then they let go the car).
oh and that M
lol well others commented on that one already