Need some advice on what games to keep

[erehwon]

I'm going to be cleaning out my Atari 2600 and Intellivision collections since I'm running out of room. I made a similar post a few days ago, but that got moved to the trading board. At the moment, I'm just interested in figuring out what I should keep. I'll deal with any trading or selling later on the trading board. I might keep some of the ones with higher rarities, but I also want to know what is worth keeping of the more common stuff. Here is what I have. Thanks for any help.

Intellivision Cart List

Advanced Dungeons & Dragons R1
Armor Battle R1 complete
Astrosmash R1
Atlantis R2
Auto Racing R1 complete
Bomb Squad R2
Boxing R1
Burgertime R2
Demon Attack R1
Donkey Kong R2
Ladybug R4
Las Vegas Poker & Blackjack R1 complete
Las Vegas Roulette R1
Lock 'n Chase R1
Major League Baseball R1 complete
Microsurgeon R2
NASL Soccer Complete
NBA Basketball R1 Complete
NFL Football R1 Complete
NHL Hockey R1
Night Stalker R1 Complete
Pitfall!/Activision R1 Complete
Q*Bert R5
Skiing R1
Space Hawk R1
Space Spartans R2
Tennis R1
Tron Maze-a-Tron R1
Tron Solar Sailer R2

Atari 2600 cart List

3-D Tic-Tac-Toe R2
Air-Sea Battle R1
Amidar R2
Asteroids R1
Atlantis R2
BASIC Programming R2
Basketball R1
Berzerk R1
Bowling R1
Boxing R1
Breakout R1
Canyon Bomber R1
Casino R1
Centipede R1
Circus Atari R1
Coconuts R3
Combat R1
Crash Dive R4
Decathlon R1
Defender R1
Dodge 'Em R1
Donkey Kong R1
Dragonfire R2
Dragster R1
Enduro R1
Fast Food R2
Fire Fighter R2
Fishing Derby R1
Football R1
Freeway R1
Frogger R1
Hangman R2
Haunted House R2
Human Cannonball R1
Ice Hockey R1
Infiltrate R2
Journey Escape R2
Kangaroo R1
Keystone Kapers R1
Laser Blast R1
Maze Craze: A Game of Cops 'n Ro R1
Megamania R1
Missile Command R1
Mouse Trap R2
Ms. Pac-Man R1
Night Driver R1
Outlaw R1
Pac-Man R1
Q*Bert R1
Raiders of the Lost Ark R1
RealSports Baseball
RealSports Volleyball R1
River Raid R1
Slot Racers R1
Smurf: Rescue in Gargamel's Castl R2
Solaris R1
Space Invaders R1
Space War R2
Spider-Man R2
Squeeze Box R3
Star Raiders R1
Starmaster R1
Super Challenge Football ?
Super Challenge Football R3 ?
Super Cobra R3
Surround R1
Telegames Center R3
Towering Inferno R2
Turmoil R2
Vanguard R1
Video Chess R2
Video Pinball R1
Warlords R2
Yars' Revenge

[Trebuken]

Keep the games that are in the best condition, or the ones you may play at some point, otherwise you should be able to replace just about any of those games without breaking the bank.