consider what you paided for it
have them pay any fees
see what your profit margin would turn out to be
if your happy, go for it.
I would
or
depending on your nature, and if you don't need the money
cause you may scare them away,
but counter offer them
nicely
comeback and say well I was really looking for 600.00, but I'd be willing
to go down to 475. or something like that
and see what happens.
Have a look here, she's a bollywood star, you may be on to something and it may well be worth tons of cash, but don't quote me on that as I'm not very good at appraisals (tend to get carried away in the evenings).