That is being over dramatic. A lot of SIG owners have received great service on used SIGs and SIG has been known to do repairs for no charge in some cases depending on what the issue is.
Who at SIG personally told you that they no longer do any work on any used SIG ??
Of course there are exceptions such as a damaged metal frame on an out of warranty SIG where they might not do anything though Bruce Gray is a possibility for that. Otherwise in such a case the owner might part out the internals and slide/barrel of the pistol for sale.
Not that they won't WORK on a used Sig. But there is ZERO warranty on any used Sig. You will pay out of pocket for anything that has to be done.
One of my best friends purchased a 'used' but basically unused P229 Dark Elite about a year and a half ago. It was a 2010 production model, but appeared to have fired a maximum of 200 rounds or so. Virtually zero wear whatsoever.
After putting about 5k rounds through the gun over the course of a year, it started to develop several spots of unusual wear on the frame rails. Like shaving the aluminum where it was jagged and will catch your finger nail if dragged across.
He contacted Sig to report the issue, first they said it was normal. When he disagreed and explained that he owned numerous Sigs with thousands of rounds through them and this was not the normal smoothing of the rails, it was actually removing metal, they asked for photos. Sent the photos. No response. Called back to ask the status, they said they didn't have the photos. Sent the photos again. No response. Called back again to check. They finally say the gunsmith looked at the photos and said there was no issue, but if you want to pay $55 to ship the pistol, plus inspection fee, we'll look at it... but you bought it used and it is not covered under warranty.
Since it sounded like this was a losing scenario, he contacted Bruce Gray and sent the gun to him for examination. Bruce looked at the gun and said the slide was out of spec from the factory and that Sig should replace the gun because it was clearly a machining error.
My friend called Sig back to give them the report from Bruce, and they again told him that "the gun is six years old" and "you bought it used" so it was not covered under any warranty. He explained that yes, it was bought used, but the slide is out of spec. I don't think the previous owner warped the slide especially since it was like brand new when I bought it from him. Sig's response was to chuckle on the phone and say, "How would you know?" So basically, laughing at the customer and telling them to kick rocks on what is obviously a factory defect.
He called Bruce back to explain that Sig said they would do nothing for him. So Bruce said he would throw his weight around at Sig and see what he could do for him. Bruce called back and said that they are telling him no as well. He explained that he fully believes the factory SHOULD replace this firearm and he has one other contact that he can talk to and will take the firearm in question with him when he visits Sig at the end of the month to hopefully try and get them to do right... but it doesn't sound good at this point.
We have not outed this story yet because we have been waiting to see what happens when Bruce takes the gun to Sig, but even if they do make it right at this point, it's solely due to Bruce pushing them on it. If it were up to them, they would be sticking a customer with a thousand dollar paperweight.
This is poor customer service all the way around.