if you want to sell value should be in 100 000-120 000usd(80 000usd for quick sale, if we can call quick for such speakers as it not a pop corn)
if you want jus to upgrade to diferent colour(sidewals) I would never ever recomend to do this. at the end it will cost arround half speakers price.
its the easiest and the most efective way is to repaint sides and maching hardware(at the back).and the speakers even do not need to be reasebled.construction of grande EM alows to repaint side panels without disasembling) just arrange everything with professional automotive service eployers and they can do the job for few grands or litle more if you choose some exclusive chamaleon colours.
if you want jus to upgrade to diferent colour(sidewals) I would never ever recomend to do this. at the end it will cost arround half speakers price.
its the easiest and the most efective way is to repaint sides and maching hardware(at the back).and the speakers even do not need to be reasebled.construction of grande EM alows to repaint side panels without disasembling) just arrange everything with professional automotive service eployers and they can do the job for few grands or litle more if you choose some exclusive chamaleon colours.