thinking about a couple of 12 backs any idea on values?

[jambobbyb]

Hi guys would really like to add the following 12 backs to my collection but to be honest I m a MOC virgin, How much should i be looking at paying for the following. i know this is a bit of a piece of string type question, so not looking for uber mint but acceptable versions C8+
Luke
Darth
Ben
Stormie
Jawa