Mostly overpriced junk, like most gun collections, but there are a few useful niche guns.
The Terracotta Arms Caravan is the best sporting rifle (tied with the Terracotta Arms DLW, which does have 5 more shots but for way more money and I don't care).
The Ultimax 68 is the big brother of the Ingram Smartgun X - a Restricted Assault Rifle with a built-in sound suppressor, which is normally Forbidden.
The Onotari Arms Punisher: AR with 1 point of magical RC. Not as much as the alpha, but this is R rather than F.
Cavalier Arms Sheriff: This does do more damage than any other heavy pistol; it has an effective 6P/-3 base damage which is quite impressive. If your GM interprets the HP ammo penalty to be negatable with recoil compensation, then taking this and modding it to have more RC and be SA will get you a really good heavy pistol. If not, it’s crap. Do note that while this gun is 7R, HP ammunition is 20F.
Krime Stopper: If your GM does not buy that High Powered Ammo penalty is negated by recoil compensation, this is better than the Cavalier Arms Sheriff. Otherwise, it’s worse (because of the 2(M) clip). It’s a somewhat shaky option because the clip is so small, but it’s tied with the Hatamoto for best damage and it still has twice the Hatamoto’s clip size.