Parts and labor? Sure. Airframe resale prices? No, that hasn't been my observational experience since fall of 2023. Certainly not inflation adjusted. But I'm not following all aircraft types, just a small sliver of it (trike FG acro 2-seater EAB).
We have no reliable mechanism for disclosing completed sales (mine wasn't, other than self-disclosing on social media). So the notion that prices "have gone up" in what the statement seeks to imply (completed sales), is facts not in evidence.
Listing prices are just like anything, a wish. Even then, listing prices have flattened to slightly decreased in the types I've been looking at. Inventory is starting to pick up. Some people still living in 2020 list for the moon, don't get bites (or pearl-clutch when one comes in with an under asking offer) and pull the listing. Based on my recent experience as a passive buyer, lots unserious sellers chaffing up the listings, merely trolling the market. I'm not chucking from the cheap seats, I was a seller in 2023 and completed in 14 days, and my available market was way more limited mind you (AOG sale). It's not just airplanes, even housing suffers from that dynamic in present circumstances; my clown neighbor for instance, still there sitting unsold.