Just received another offer via email.
$450 is now the highest offer.
Pretty much 10 hours to go until this auction is over.
Proof of all bids made can be supplied to the potential winner if needs be
A potential bidder raised a very good point which I have listed below:
"So you are going to end it exactly at 10pm tonight even if people still want to put bids in? Its just a little hard to manage an auction ebay style when its sort of informal via email and forum posts. I'm interested just not sure if I can time my email to hit you exactly at 9:59 and 59 seconds

"
My answer to this was that 10pm is the time set for the auction end date but I am willing to use common sense to decide the winner so if an email comes seconds late that will still be within consideration. Please however get the bids in as close to 10pm as you can because it won't be fair if I extend the auction by minutes.
Once again thanks to everyone who has shown an interest
