Spectre of Pithecanthropus:
Probably depends on what you’re using for an index.
When I was a kid, comic books came in two main sizes: regular issues and special “80 page giant” editions. The regular issues cost 10¢ and I believe the same size comics nowadays retail for about $3, and that’s almost the same markup as $30 to $1000: factor of 30, give or take.
Mainstream cars had sticker prices in the mid-to-upper $2000’s and haven’t gone up quite as much (comparable cars seem to go for $35K to $50K).
Letters took a nickel stamp and now cost, what, 37¢? Less markup there, just a factor of a bit more than 7.
Soda has gone from a dime to a buck for a can. Factor of ten.
Don’t know cigarette prices from my childhood but in high school they sold for 50¢ a pack and now it looks like they cost around $7. Factor of 14 over a shorter period of time.
Pay phones, to the extent they still exist, take a quarter now, took a dime when I was a kid. Factor of a mere 2.5 there.
Then of course there’s the computer. I have no idea how much it would’ve cost to buy a computer in the early 1960s but jumping ahead to the 80s, a high-end Mac (the IIfx) ran for a bit over $10,000 and a new dual 2.5 GHz G5 can be yours nowadays for $3000, so a factor of 0.3 over a shorter period of time.
I don’t know general prices from the 1930s or 1890s, but I do know that single pieces of candy of the sort that will cost you a quarter apiece in the deli nowadays went about a half-dozen or more of them for a penny (factor of around 150); and the Ford Model T was a $500 car, yes? Factor of 100.