I have 3... a .410 Mossberg shotgun, a Christmas gift, from my folks, a .22 rifle, also a gift from folks, and my .22 Ruger Std. model, my first handgun .....
I have about a half dozen guns that I've inherited from grandparents/great grandparents. I couldn't ever let any of them go. The other is my first gun, a JC Higgins .22 bolt action. It has memory value to me, but on top of that I'd probably only get $50 for it. It's worth way more to me than that.
I actually have 4 guns that are on this list. But if I had to pick one it would be my Walther P99. It was a gift from my wife. She bought it for me for Christmas the year after I finished grad school and got a real job.
I have more guns from my family than I bought myself.
My grandfather's old Remington .22 rifle stays, by uncle's old Rossi .38 Special stays, my father-in-laws Browning Auto-5 stays, as does his old Winchester 20 gauge, and his old hunting rifle. I don't really even consider these "mine", I'm just holding them until I can pass them along to my daughter.
The rest of the "collection" can be bought and sold at a whim.
Easy question! My Foster Father's old top breaks. He was an old black man that grew up in a segregated southern Mississippi and changed the life of a young white punk kid. He's gone now and those old revolvers are all I have.
I have two handguns that won't go any where til my end of days.
Top my HK USP 9, and below my 1911. I put this pistol together myself back in the '80's.