When i sold my modified jimny i actuall got £1000 less than the price standard ones were going for, always best to keep all the standard bits you swap for modified. I sold my 54 reg O2 soft top when it was just less than 2 years old for £4300, standard ones were making £5500 at the time. I had a rocklobster conversion, ARB bumper and winch, pukka snorkel, castor corrected radius arms , modular rims the lot.
In my opinion get some standard bits and sell the modified ones on, or do a deal wih a newbie on here for theyre std bits.
Gary