They didn't make many Tourers.
Rarity doesn't mean collectibility &/or desirability, of course, but that won't stop a seller from trying to leverage a lack of choices for a potential buyer.
I've been sorta keeping an eye on Tourer prices pretty-much since we bought our car 5.5yrs ago, ignoring possibly-silly CoronaBump prices right now they really haven't moved a lot for GenF & GenF2.
Look at what else they are selling
https://duttongarage.com/prestige-cars
They are aiming at a specific market. Someone out there will pay for a tourer with extra low km.
WTF - the gunmetal 30th Anniversary one is $130k!
Hard to believe they can successfully sell at an inflated price due to rarity, which is what they're trying to do, when they've got about 2 of each colour HSV ever made them in!!