Sell with or without mods

[griff7]

Have a friend who is about to sell his csl 04 plate with fsh and 53k miles,xenons stereo and aircon.Earlier this year he put full ap brake kit on front and rear and kw clubsport suspension.Would it be best to take off the mods and sell them seperately and if so where is the best place to advertise them?or sell as it is and what sort of value would it fetch with or without the mods.
Thanks andy