@bgyoshi
Thanks for the bump; this reminded me to cross some suggestions off the list that have been implemented.

Just to briefly clarify, there is currently no way to privately gift/trade/sell eggs. Private sales are only available for items.

I agree that there are still some things with the auction system that could be improved. While I don't want the minimum bid increase to be removed because a lot of people (including myself) wanted it for good reasons, I will say that for a certain group of players, it makes an already bad auction experience worse. My main gripe with the auction system is that, for being one of the biggest player interaction features, it sure is unwelcoming to new players...who are the people that need to be given more reasons to stick around. The usershop search function has alleviated some of this, but the auction system is such a big feature that I don't think anything justifies new players being financially secluded from it. I still feel that the auction system would benefit from being divided up in a way that players can only compete with their financial equals; this way the auction house is more fair to newbies. As for using scripts, I think our GMs have ways of detecting suspicious activity based on patterns of behavior, but I'm not allowed to know about their process, so I'm not 100% sure how they deal with that. Knowing Komodo though, he probably has solutions for most types of cheating since he's had a petsite before.

Edit: In this paragraph I kept saying "minimum bid" when I meant "starting bid." I've fixed that now. :P
Regarding sellback prices as the default starting bid, Komodo did set the auction/usershop parameters in your inventory so that the default price is the sellback price. However this isn't a forced minimum; you can still lower it if you wanted to. The reason for this is that some players are charitable and wouldn't want their freedom taken away. That's not just an assumption either; players discussed this on Discord and the general consensus was that they'd be upset if a default starting bid was forced. I understand the intention of forcing a minimum price though. One player told me that some new players are still setting their starting bid below the sellback price despite what Komodo implemented, and I can't think of a reason why a new player would willingly do that when the information is right in front of them. Maybe they think no one will bid unless it's at 1 PC? Who knows.

On the subject of PC inflation, I'm no expert on game economies, but I do want to mention that Komodo recently made housing unlimited. And since the server housing market was already the biggest PC sink in the game, this has made it even more effective as people no longer have to wait for certain houses to be restocked. However, I have to admit that there aren't many appealing PC sinks for endgame players. I like to throw my money around, but I'm just spreading it, not removing it from the game. I liked some players' ideas of a server shop where you can buy randomly-stocked rare items and deco for PC. In fact, something like that may be coming in Pixpet Adventure, as well as other PC sinks, but we're not sure of the details yet.

TL;DR, I agree that auctions still need improvements, and PC inflation may be alleviated by Pixpet Adventure.