I'm filling gaps in my CIB NTSC Atari 2600 collection nowadays.

Recent purchases are:

Subterranea
Mr. Do's Castle
Tunnel Runner
Raft Rider
Tax AVoiders
Glib
Cruise Missile
No Escape (have CIB PAL)
Omega Race (with Joygrip - my CIB is beat up)
and some more where I have PAL versions but also want the NTSC ones