What can I add? The oddballs that take STANAG mags, like the Daewoo K2, AR-18, and SIG 556 are cool. Maybe they aren't everyone's cup of tea but they are nifty and collectible now.
In my top 10 would be a few flavors of AR--including an A2 with triangle grips--a few AKs, an M14, and a FAL. The G3 pattern isn't my thing but it's interesting.
Picking just one collectible .22 would be tough. Same thing with a 12-gauge.
Interesting how perspectives have changed since most of the 2010 posts. I bet a 308 battle rifle would be more prevalent these days, as might a suppressed 22. The 10/22 Takedown might supplant a regular 10/22. A 300 BLK rifle/SBR with suppressor would also be more in vogue, as might a Tavor/Aug/PS-90. Obviously picks like an M1 Garand, Winchester 94, or Swiss K31 haven't gone out of fashion.
1.) Colt LE6920
2.) Bulgarian SAM7SF
3.) WWII S/A M1 Garand (corresponding numbers)
4.) pre '64 Winchester 30/30
5.) JM stamp Marlin model '94 .357/.38
6.) S/A M1A1/ M14
7.) pre '64 Winchester model 70
8.) Ruger 10/22
9.) WWII German Mauser K98 (with all cartoushe's intact and matching numbers)
10.) Steyr AUG A3
Bonus: WWII Japanese Ariska type 99 (w/ full mum, aircraft sights and matching numbers)
in no particular order:
Finnish Mod 39 (if you are going to have a mosin variant have the best)
M1 Garand
Kimber 82 sporter .22lr
1871 Springfield Rolling Block .50-70
AR-15 variant
1903 Springfield or 03-A3
No.4 MKI Enfield
Mauser Action .30-06 Scoped Sporting Rifle
lever action .30-30 ...I prefer Winchester
CZ 527 in .223