Lol. Brettzky you are lacking significant knowledge on this one.
I don't like the gimmicky Legion marketing but they definitely have upgrades like the triggers (Gray Guns), tritium night sights, and ship with 3 mags not 2. The new Legions - which this one is - have a harder Cerakote finish which addresses the previous problem - they addressed this a few years ago, if you'd been keeping up.
The 10mm P220s have always fetched a good $500-700 more that the 9mm/45 versions because of the development that went into them and they are way over built. Because the 10mms are rarer and typically in higher demand, dealers never discounted them like the 9mms which flooded the market. This one has 20% premium which is totally reasonable considering the mark ups happening right now.
Brother you are hypocritical when it comes to pricing. Didn't you have a $5K tag on you Wilson Combat Beretta which retailed for $2K, and you are listing a Shadow Systems MR920L for $3K on EE. Many would say that is insane giving the number of Shadow Systems still available at retailers between $1500 and $1700. For the same price, this Sig 10mm is twice the gun with twice the cool factor.
It is unfair of you to call out retailers on this site, when you need to be called out.