I keep forgetting that people love their boxes...
I do need to design a box for an Intellivision game anyway, so I guess I could make a box for this, too. The box will look sort of like a classic Intellivision box, with construction similar to a Parker Bros. box. They will be printed locally and assembled by me. At the same time, there will be a manual, likely a single sheet folded once, to make a 4 page manual. I think that will suffice... I'll add more pages if required, but it's not like we need too many pretty pictures to show gameplay and backstory. All cutting, folding, and assembly of the boxes will be done by me, but they will look as good as pretty much anything else, and the box will be strong.
The loose cart is planned to be introduced at $85 USD. That might also include a manual (or will be a download), except that the manual is more complicated to mail. The box (with manual of course) will be extra. I don't know how much yet. I feel confident that the maximum would be $15 USD. I'll have these ready for sale at the same time as the cartridge.