Tonight I saw a NIB, unfired Scorpion on AR15.com for $1250 (unclear if that includes transfer/ship fee, but it's marked down from $1350 so may be negotiable if fees are extra). Link is here: AXG Scorpion NIB Looks like a reputable member. Given it's unfired, it is very possible the gun is not yet registered with Sig, which means you may be able to get yourself a full warranty.
I've purchased on AR15.com before, but with extreme vetting. Unlike our forum here, it is less well managed, and scams seem to happen more often. For my purchase (a NIB P238 Legion), I was able to vet the person to my satisfaction, including in a long phone conversation, and the deal went just fine. The onus is on the buyer however. The good news is - what you seek is out there! Good luck in your quest.
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