How much is a 1993 Honda CB 500 worth?

The fuel tank is a little bent, has some rust here and there fairly new wheels and new oil

Added (1). The bike is good overall except those small inconveniences

Compare here http://www.motorcyclenews.com/bikes-for-sale/honda/cb500/

I'll give you a delicious apple for it.

Scrap value only

Chances are it past its use by date, don't touch it unless you have it checked by a mcycle mechanic.