Anyone else noticing inflation in used gear $?

If it is a best offer listing we don'r really know the final selling price unless we participate in transaction or communicate privately with other members. Personally, I pay little attention to the asking price when willing to buy, I just offer what I am prepared to pay with some room for negotiation.
Most good 10 year old gear requires nothing for at least 5-10 more years except tubes of course. Almost all my gear is more than 10 years old and I hear no difference compared to what it was 5 years ago.

I might also mention that there is a seasonality to sales on this site. I have always made it a point to buy in the summer and sell in the winter, though that might not be practial for all involved.

Well, often you have to buy when what you want is available which is not often especially taking into consideration who sells the piece. Better pay more and deal with seemingly more trustworthy person.

This is all speculation on my part.

I think the listing prices rising on vintage gear or gear in general is due to sellers getting outrageous low-ball offers. They are starting their pricing a bit higher to accommodate that.

E.g. I had a McCormack DNA-1 long ago that I listed at a price based on the avg of DNA-1s I saw here and on other sites in the same condition. I really believed I was at fair market value. I was getting offers of 30% to 40% below my listing price. If I was selling now I'd start a bit higher than that avg to get less insane low-ball offers. I'd get better offers from those who will base their offer as a percentage of listing price.

I also think starting prices on vintage gear may be higher due to people accounting for all the costs that go along with selling on A'gon. Maybe people just didn't notice it before in the better economy. Between the listing fee, ending fee, increasing costs of shipping, cost of using paypal etc etc selling here can be bit more than other sites. I'm not complaining about what A'gon charges. I pay the charges and still sell here when I can. I'd pay these prices to deal with the more professional people here any day. I just won't be listing small dollar items.

Inflation is not just in used gear. The price of parts is going up as a result of the value of the dollar. The best used gear has appreciated about 30% since a year or two ago, but it is absolutely a good buy.

There is no better indicator of what gear is actually worth, than to have it appreciate on the "Gon". No one knows audio gear better than shoppers here.