Archie's Grobags

Again it then means halfway through the month i have to then repost what's available again and wait for people to decide and pay and collect and everything ends up last minute again.

Fair point.

+1 to paying up front then. Every other business does this so why shouldn't you. People shouldn't have a problem with this.
Perhaps then people will realise this is your job and not take advantage of your good nature.