I'd say ask for 2/3 what you paid, expect 1/2. Post some photos on any sale thread you start to help affirm condition, including powered on. If you can take a short video to show that it works, some folk might like that, but not always necessary I'd think.
Also, if you happen to have kept original box and packaging, let folk know... Some will definitely like that.
Unfortunately, Emo doesn't really have a legacy support policy and this is known in many circles. Buying an older Emo will carry risks for those that know how quickly they tend to retire product and not have parts available.
Good luck on the sale!