If you have trouble finding a seller, I believe that they're not entirely gone yet. Uusi will usually reserve a small number of their gilded editions for direct sale on their website after the KS rewards have been distributed. The price will certainly be higher, but shouldn't be stratospherically high.
The most recent update, dated yesterday, states that they just received the decks from USPC. I'm assuming they'll be dealing with distributing the "all-deck" orders first as they're the simplest to fulfill, followed by the orders including items that are already stocked and lastly, the orders with items they need to make - some time is needed to gild a small supply of the decks which they just received. You should check with them to be sure, but odds are they'll be on sale at their website within a month or so.
In fact, right now, they're
offering copper-gilded Pagan decks for $150 each. Both deck colors (dark and ivory) are still available and only 25 of each were released. Keep your eyes open and you have an excellent chance of getting a deck at retail, should all else fail.