cars with these modifications dont' have any resale value.
people do it for their own gratification and pleasure not for market value.
because a modified car may look the best to you but may not have any attraction for a buyer.
usually people do not waste their genuine cars. but find a damaged or accidented car and then fulfil their desires on that.
My advice is that if you want to modify your car, then do not sale the orignal accessories like (bumper lights stearing, seats, speedometers, side mirrors even orignal rims) which are removed from the car keep them with you, they will be helpful at the time of selling.
Atleast you can convert your car back to orignal whenever you wish.