i have just sold a 110 on Ebay, listed it on a Sunday Eve, for 7 dats, any auction ending on a weekend seems to do better.
Put a reserve on it which cost an extra £10 however means you know what it will make minimum. Started it at £0.99
Think to list it was around £25
It made reserve by Monday and sold for way more than i was expecting.
It is a sellers market out there, and on the bay it will probably make more than you think.
On facebook or an advert you have to set the price.
Good pics, thorough description, be honest and then just put a foot note on mine saying remember you are bidding to buy etc, not negotiate
Have a look in the For Sale section on here you will find my thread and the ebay link, don't take any offers just let it run it will make good dosh
Good luck