Somehow I missed seeing this post until now.
The Boone carts used to be considered super rare, but a bunch of NOS got found a great many years ago and sold off, so they are more quite rare nowadays instead. Never seen pre-production copies however, and should be dumped just to compare if they are any different (unlikely as Tempest notes) to the release versions.
Never heard of Ice Palace being lined up by Xonox, so VERY intrigued to see that dumped. Entry at GB64 for the C64 version of the game: https://gb64.com/game.php?id=3689
@Dougmanct if you're interested in letting the Vic20 Lancelot and Robin Hood CIB carts go, I'd be interested. I've got all four double enders and five of the eight single enders CIB, so these two would tick off only then needing one. Also if you need any advice or a hand dumping Ice Palace, ping me a message, had plenty experience over the years getting ultra rare Vic20 (and C64) titles out into the wider circle for people to play. If you've got an actual Vic20, cartridge port switcher and Commodore disk drive, you don't have to remove the chip from the board either.