Tier 7 sold for 8k and 9k:
Tier 6 sold for:
about 6.5k and then selling for 7.2k 7k. 7.5k and 8.5k
Tier 5 sold for 6.5k 6.4k (the 4k sale is just a random fail by someone.
Tier 4 is steady on 5k street, with an outlier last year:
Tier 3 is the same as above just a tiny bit lower.
The auction history is not even remotely close to 10k, it barely gets close to 7k, and that is when you reach a tier that a TIR 3/200 gun wont see in a few years of absurd amounts cycled. the reason that "decade" shows 10k+++ on all of them is because that is the average price throuought the past decade, if someone sold a MK1 on each tier for 100k, that average would grossly go up, that is why it is better to click on the buttons and look at individual sales in recent times to get a proper picture of what a item is actually selling for.
It also has such a low TIR rate that it stands out like a sore thumb, it likely never will see a decent tier simply due to the absurd amount of PED needing to be cycled into it. If it had 199/200, then sure, asking a highly inflated price would make sense, but when it can barely get any worse, the opposite is realistic.