Insta Prices, Minimum Raises and Accepted Payments are optional, however, if set, must be announced in public, and cannot be changed, negotiated or added once:
In-game: The auction has been announced.
Forum: The auction has started.
So far, the only comment I have: for more consistency, I'd say you can change these conditions both ingame AND forums BEFORE the auction starts. It feels weird that you cannot change your mind on the insta, minimum bid and accepted payments BEFORE the auction begins if you do it ingame. What if you simply want to facilitate people being able to bid more easily by increasing the prices of the accepted payment items BEFORE the auction begins? Example:
-I'm trying to sell a Gastly 20+ IV Timid in Trade Chat. I announce:
Start: 50k, min bid 5k, auction duration 20 minutes from start bid, insta 300k. Accepted payment Rare Candy as 5k, Pokedollars
^I get no bids for the first hour announcing it. Thus, I decide to change:
Start: 50k, min bid 5k, auction duration 20 minutes from start bid, insta 150k. Accepted payment Rare Candy as 7k, Pokedollars
This should be completely allowed, I do not see an issue with it. If the auctioneer gets a bid that starts the auction just before he is about to edit the conditions, he will have to settled with the conditions he stated on the auction template, just as forum works already.