With a portable that has a built-in battery, supposedly good for upward
of maybe 1000 cycles, part of the depreciation is in such items that also
have a diminishing shelf life. At least these aren't as bad as older 'Books
with a different battery technology, with only up to 300 cycles, or far less.
You mentioned minor surface issues, "There are some very tiny scratchs
on the bottom. Still in great condition..." and such minor defects may be
gently removed by careful use of soft cloth and a tiny bit of plastic polish
such as is used for other polycarbonate products, like lexan motorcycle
windscreens, and other parts.
Information in the operating system, such as the Power and Battery
info in the system profiler, could reveal the status of battery life and
that of power cycles (discharge recharge) among other numbers.
This would also be of help validate a claim of overall condition status.
At web sites such as wegenermedia.com they repair and also sell a
few refurbished older portable macs, have images, and prices based
on build year model and specification, and lastly condition. Since
schools and larger groups sometimes get rid of many of these at one
time, there can be dozens available in batches; some of these may
be acquired at reasonable price and be restored, repaired, etc and
be in great condition in all other ways than case cosmetics. However
to be able to sell yours at best price may require different means of
advertising, a careful showing where it is secure, & safe for you, too.
Everyone wants to see it working, yet it may be best if the unit is
correctly wiped and then set up to start up like it was new, in a
set-up mode where that buyer puts in their personal info to make
a new admin user account on first startup. Of course, any additions
after you bought it would be lacking, and a later upgrade to OS X
past the included version would be up to the new user to get, as
that would require their use of their Apple ID to get a newest OS X.
Anyway, hopefully that works out well for you, and find the premium
of markets for a seldom used near as-shipped mint condition Mac.
Is there an independent Apple reseller you know who may take a
very clean previously owned Mac computer on consignment? LOL
Good luck & happy computing! 🙂