Unreal intake manifold cost

Too cheap. Going price is more like $300. Understand, I clean them up (bead blast and repair all stripped threads) and no, I paid more than $80 for them. Then there is the carrying cost of money. I have been collecting parts for 45 years.
You can't buy a hemi cuda for $6000 can you? People complain about the high cost of late 60's and early 70's muscle cars, but look at the price of a Hellcat (or even a new Honda Civic)! When I bought that first LD340, I was making $2.20/hr! Lets put things in the proper perspective.
When we get older (I am 65) we think prices should never change from what we remember them. And yes, I bought gas for $.25/gallon when there were gas wars (who knows what a gas war was?)!
I'm 62. For what ever reason, people think that when they sell certain things that they should get over half of what it costs new. I seen a edelbrock performer intake for $300 (used of course) which at the time a new one could be bought for like $350. IMHO that isn't a bargain, not even close. It's not always supply and demand as new intake manifolds are available. A lot of it is that people have to have the item right now regardless of cost. As there's a couple of different intakes listed on my post that are reasonably priced. If someone is restoration their 340 or 360 4 barrel back to factory specs then I can understand paying a couple hundred dollars for a factory 4v intake manifold, other than that I don't feel that they are worth it. Even the second hand resale shops are getting expensive. It's just not supply and demand but what ever someone is willing to pay, myself, I'll watch for the true bargains.