Okay, so everyone has their own opinion, but this is obviously mine.

If it’s just paper work and the original box/ HK case/ and everything else it comes with as it should from a LGS. 3100$ or LOWER… is a reasonable and good price. Especially in 2023.

I got mine the other week for $3139.24 with tax. (This was at 2,899.99 v.s. 2999.99 BRAND NEW LGS MSRP price SA, TX. If that matters, I’m very drunk so bear with me. We only have state sales tax at 8.25%)

Moving forward. What does your buddy want for it? Personally speaking, I have only bought one firearm used, my FN 5.7 FDE, it came with a extra mag, 150 rounds, and everything else original.(1240$ total. Could of bought one at 1099.99 -tax in 2021 but price of ammo was ridiculous.)

With inflation and everything else in the current year, price is the biggest factor. The gentleman that sold me the used 5.7 informed me it had 800 rounds ran through it. Still felt great and was completely reliable when I shot it.

Also keep in mind inflation and current prices on other things. I hope you get back to me with dudes price if not, no worries, I hope this helped!