The funding will most likely make the premium worth less and the situation a little trickier. I'll be bidding if the price is right when it goes to auction.

Why?
Probably because it will exclude people who want to buy it unfunded and have less people interested in the piece because anyone can fund it once you have it but you cant unfund the piece once its on. And others like the piece as it was created. I think thats where digi was going with it.
Pretty much what wheelz said and I'd like to add this point - you're hoping he didn't generate a vanity address with that prefix for which he controls the keys. Unless the COA/case are provided as well for which the address can be checked against, the public funding address can't be verified to be the exact one on that coin without manufacturer/maker verification. The risk is higher since the coin was initially unfunded by the maker and any responsibility for the funded value sits on the buyer in this case.
Unfortunately I can't find the certificate that came with the coin. I'm not really looking to sell right now, just curious of the possible value. If I were to sell, I could contact the maker and ask him if he possibly has a copy of the full address to prove that it's not a vanity address.