Hmmmm. Maybe he took the cabs that are very rare and (at least) from a collectors point of view more valuable: Tempest, Star Wars, (Nintendo) DK, Space Duel, Gravitar ............... Most of the Sega titles are less rare and many collectors already have a certain amount of "medicore" titles from the later 80s or 90s. Then all the cabs pictured are at least very very dirty and some seem to be modified or not complete. A Bezerk with a hacked panel i.e. is very bad. No chance to get a boardset and original panel with controls for that and you can bet that the wiring and transformers and stuff is badly hacked to get another pcb running. There is a good chance that that guy really picked the best pieces already...