I love getting a good deal. Interested in ammo, firearms, and firearm adjacent items.
Currently keep up with r/gundeals on Reddit, the gun.deals website, ammoseek.com, wikiarms.com, and I am signed up for MrGunsnGear's Daily Deals emails.
I’ve had decent luck with texas gun trader. There’s a lot of crap you have to sort through and there’ll be lots of days where nothing really interesting gets posted, but I’ve found more than a few good deals on there over the years.