Thought I'd share this, not here,over on zin, thankfully guy was wise to it, but the scammers are getting better with photoshopping stuff, as usual targeting wanted ads.
Keep up with due diligence, if the seller doesn't have considerable feedback & forum presence then ask for more info, & maybe some staged pics, get his nan in a picture holding the gun lol, & lastly, only ever pay via Paypal goods & services, never f&f or bank transfer, or if you can, collect it in person.
https://forums.zeroin.co.uk/forum/classifieds/rate-a-trader/3324582-qt09-scammer-avoid