Retail?

Quite a divide. I notice this issue lately since the past 3-4 years have seen a significant increases in MSRP - there is something about profiting in that windfall that rubs me the wrong way, I guess there is no definitive right or wrong on the issue, that is simply my personal take on it. I don't have an issue with a collectible like a Mac or Marantz rising in price, like a 67 Corvette, I have more of an issue with something like Manley gear that increased 50% in one year. But yes, you are free to buy or not buy, I get that.

Price for the item when new. Cannot list the current new price as often times the unit has gone through changes along with the price increases.
Straight forward answer it seems to me.

It’s hard to keep perspective on “Retail” when the likes of Nordost holds a yard sale like they’re doing today.

Retail price at time of its purchase. But if you wish, in the description feel free to state for what they currently retail. Otherwise you are just being deceiptful. You should not lie or deceive.

Some sellers are very sensitive if you ask the date of manufacture of a component.

That would make me wonder what else they wanted to hide.