Making some assumptions here:
The paint has minimal chips especially the front
The interior is in excellent shape, no tears, rips, stains
Included, both tops, the bag, the air deflector, tool kit, owner's manual and 2 complete sets of keys
Wear commensurate with 16K miles on the tires and brakes and the tires are not over 7 years old, the battery not over 5
A recent "C" service with all it entails
The front spoiler is included and undamaged
Everything works (that means EVERYTHING and it works correctly)
No accident history
Complete and recent service history
Depending on where the car is it can be worth between $45-50K
David Teitelbaum