The thing about mods is that beauty is in the eye of the beholder. If you have a machine with mods and another person has one with no mods, the modded machine will probably be more attractive, assuming the buyer likes the mods. Things like a shaker motor and color DMD, probably will be attractive to most people, but not all. Adding LEDs is another good example. A lot of people would probably like having LEDs installed already because they would do that eventually themselves. However, some people hate LEDs and would prefer the standard bulbs. It is difficult to put a value on these things, since there are so many different opinions.