I would be curious to find out the price in this 2017, day and age.

Decades ago, i purchased that single, left side, Max Wedge Tri-Y exhaust manifold from a collector in Michigan.
Bought it from a for sale advertisement in Hemmings Motor News, before you did anything on the internet, and before ebay ever started.
Remember the old dinosaur days?

I kept that manifold for years and years, in my collection, stash, hoard, of parts.
If i remember corretly i sold it off for $1,500.00 to somebody back east in New Jersey, or Pennslyvania.
Can't really remember that far back, though, on that particular.

It's been sold numerous times to others, throughout the years, to select buyers, for something like that.

A single right side has never surfaced for sale, to my knowledge, to mate up, with that leftie, so i never had any regrets in selling it off, when i did.

Jim V.