Because of the low serial number, expect prices of at least 300 dollars? I suggest it should be much higher than that. Based on the prices for other 5oz bars like engelhards.
Well, I was kinda basing it on this auction going on: http://bit.ly/121Nxe7 But personally I feel your bar has more premium!
That bar is in immaculate condition and should command a high premium. If your thinking of selling don't give it away. Here's a link to a collector of 5 oz bars. May be worth shooting him an email and a pic. http://silveringot.blogspot.com/
The only way to know its current worth is to let people to bid on it, or make offers! Being No. 000001 should have some premium I would think. The person owning 000002 may be interested... I like the idea of a year/date stamped on bullion too.
It's worth as much as someone is willing to pay, and I presume someone would be willing to pay a very high premium. You just need to find the right buyer.
I'd value it at $400-$500 easy Premiums are down recently , but we haven't seen one of those for a while Auction it here or fleebay to get worldwide coverage , as it would most likely go to the US