I think that Ward did an excellent job researching the VIC-20 section and for the most part his rarities are spot on. However, the values are inflated and often completely absurd. For the rarest of the rare, the values may actually be low, due to increased interest and awareness (i.e. more people know what is rare). On the other hand, anything less than, say, R8 will almost never go for more than $10.

I've gone through the list and assigned some values that I think are more reasonable. This isn't a complete list of VIC-20 carts, only the ones that I could put a value to off the top of my head. I've also left off any that I don't think need changing. In all but one case my values are much lower. I included Tank Atak as an example of the rarest carts being undervalued.

Name | DP Value | My Value
Adventureland Adventure | $5 | $1
Aggressor | $13 | $3
Alien | $7 | $1
Amok! | $22 | $5
Apple Panic | $8 | $2
Astroblitz | $9 | $2
Black Hole | $17 | $2
Cannonball Blitz | $24 | $5
Centipede | $2 | $1
Choplifter | $9 | $1
Clowns | $9 | $2
Cosmic Cruncher | $3 | $1
Count Adventure, The | $5 | $1
Crossfire | $11 | $5
Deadly Duck | $21 | $5
Defender | $8 | $3
Demon Attack | $6 | $1
Dragonfire | $19 | $3
Face Maker | $18 | $1
Fast Eddie | $22 | $7
Final Orbit/Bumper Bash | $27 | $9
Fourth Encounter | $9 | $3
Galaxian | $30 | $10
Garden Wars | $7 | $2
Gorf | $4 | $1
Gridrunner | $7 | $3
IFR (Flight Simulator) | $17 | $5
In the Chips | $19 | $2
Jawbreaker II | $14 | $5
Jungle Hunt | $5 | $2
Jupiter Lander | $3 | $1
K-Razy Antiks | $11 | $3
K-Star Patrol | $11 | $3
Lode Runner | $19 | $10
Lunar Leaper | $28 | $10
Mastertype | $20 | $5
Meteor Run | $18 | $5
Miner 2049'er | $22 | $12
Mission Impossible Adventure | $5 | $1
Mole Attack | $8 | $2
Monster Maze | $14 | $9
Mountain King | $22 | $15
Ms. Pac-Man | $5 | $3
Omega Race | $5 | $1
Pac-Man | $5 | $1
Pinball | $5 | $3
Pipes | $19 | $3
Pirate's Cove | $5 | $3
Princess & Frog | $35 | $15
Programmer's Aid Cartridge | $10 | $3
Radar Rat Race | $3 | $1
Raid on Fort Knox | $7 | $1
Rat Hotel | $15 | $3
Renaissance | $20 | $7
River Rescue | $6 | $3
Sargon II Chess | $4 | $1
Satellites and Meteorites | $27 | $12
Sea Wolf | $15 | $3
Serpentine | $18 | $3
Shamus | $21 | $5
Skibbereen | $23 | $5
Sky is Falling, The | $9 | $3
Skyblazer | $36 | $12
Slot | $7 | $1
Snake Byte | $18 | $10
Speed Math/Bingo Math | $3 | $1
Spider City | $23 | $9
Spiders of Mars | $26 | $5
Spills and Fills | $19 | $2
Star Battle | $33 | $12
Star Post | $12 | $4
Star Trek | $11 | $3
Submarine Commander | $8 | $3
Super Smash | $4 | $1
Tank Atak | $35 | $45 (at least)
Threshold | $28 | $7
Tomarc the Barbarian/Motocross Racer | $25 | $15
Trashman | $12 | $3
Turmoil | $17 | $7
Tutankham | $21 | $10
Type Attack | $21 | $3
VIC Avenger | $3 | $1
Video Vermin | $28 | $5
Videomania | $8 | $5
Visible Solar System | $4 | $1
Voodoo Castle Adventure | $5 | $1