As said by stryfox in his post above, your best bet would be to sell your mods 'unless' you find a buyer
that is willing to pay above KBB. Otherwise, you will never recoup the cost of your mods. Typically, such
mods rarely increase a vehicle's value, in fact they may depreciate the value.

Currently, KBB private party sale price for your car is $21,055 (that takes into account of a premium stereo
system). Add on what you want you think your mods cost, and lower the price accordingly if the car doesn't
sell.

Good luck.