Having shared my success story above....
I still have a pair of 3 year old adult wheatbelts which I bought 2 April 10 which still hasn't eaten...I tried adult mice , i've tried weaner rats, I've tried lizard coating them, i've tried bird fearther coating them...still no response. However, I did get bitten by one of them which was a shock at the time as these guys have never bitten before. (I guess because it smelt the bird feathers on my hand)
Anyway, I've given up on the adult pair so I'm now turning the heat down for the cooling process for the winter. My theory is that we are not doing anything wrong, I believe the change in the enviroment at the previous owner compared to their current situation has somewhat altered and the snake is a bit phased. It may be the enclosure is a lot bigger or smaller than what the snake is accustomed to or the food you are prepairing is different eg you may be feeding frozen whereas the snake is used to fresh warm food, maybe the snake is not used to the pungent odour of fresh rodent perhaps we are not reproducing the same heat gradients that the snake is used to etc etc... I changed over from beardies to snakes late Nov 09 and I now have 13 snakes . Quite a few came home refusing to eat, the majority will eat within the week with some holding out for a fortnight.
The hatchie and the wheatbelts are the worst I've experienced.
A message to all the experienced snake keepers out there: PLEASE KEEP ADDING SUGGESTIONS TO THIS THREAD I'm sure it will help out a lot of people for years to come!!