Well that's easy to say, but has the price of a jug of milk and a loaf of bread stayed the same over the last 20 years?
I know the price of gas and vehicles has changed...
In my experience at gunshops and gunshows, it's better to put a pile of parts together and then ask for a price on all of it rather than picking out individual parts.
In my experience also, often the price tags on small parts is what the original retailer asked 40 years ago.
Sometimes it's easy to tell, like when the name of the (out of business) business is on the tag....or you recognize the handwriting (or cost coding) of the out of business owner![]()