Jokes aside. That's economy. You can't expect prices to be the same as 5 years ago. Everything goes up. More likely with successful company like HT. High deman, high prices.
Actually we barely have 1% inflation in the U.S. The EU even struggles to hit that mark. The Yuan has actually actually declined at least 10% over five years versus the U.S. dollar. And no, not all goods an services go up over time, just ask anyone here who has been 3D printing over that period.
Sideshow has raised priced because of riding Hot Toys' coat tails. I think it was a mistake because it turned a lot people hostile to Sideshow (well, more so) because their inevitable failures now cost a lot more. I mean the X-Wing Luke figures are absurdly priced and the price jump for IG-88 is outrageous.