The Winter Night Vulnyx is no longer available for purchase from this thread, as she will be the next pet I auction, which begins tomorrow.

Crackling Fire Aurleon is the next one to be auctioned, starting tomorrow.

The prices in the OP of this thread are the initial pricing for each pet. When put up for auction, the starting bid is the cost of food for that pet and the buy it now price so far has been a multiple of the starting bid, but for future auctions will be an amount I choose more specifically. After auction, any pet that doesn't sell will be put up for public sale at a price that will most likely be higher than the price it had before auction. I am going to list what those new prices will be going forward as I set each pet for auction. First example posted below.

Crackling Fire Aurleon is at auction. Starting bid is 500 gold, buy it now price is 50,000 gold, and should the auction fail her public sale price will be 40,000 gold.

I've edited the OP to include the following information:

Prices shown above are each pet's 'discount' price.

Every week, a different pet is set for auction, with the starting bid being the cost of food through end of auction.

If a pet fails to sell during auction, it is set for public sale at that pet's 'retail' price.

Each pet's auction's 'buy-it-now' price is that pet's future 'retail' price.
^{I didn't think to do that with the first three auctions.}

'Retail' price is greater than 'discount' price, but not exorbitantly so.
_{Ping or PM me for any questions you may have.}

Each pet is released one month after they are put up for public sale if they have not sold.

Lemming Luffox is the next auction, starting tomorrow.

Crackling Fire Aurleon did not sell at auction and is now up for public sale until she sells or her release date, March 17th, whichever happens sooner.

Maule's Quince Bulbori is next pet up for auction.