You should have some higher kickstarter tiers with discounts on the carts so people can buy in bulk! Like 100 Cases for $1300 etc. And there should be some kickstarter bonus rewards at higher tiers too, like Shockboxes and Neo Geo swag. Maybe a tier where an artist who wants to toss in his support will design you a custom sticker template for your entire collection? There could even be a $1800 Tier that came with 100 shells and an Omega CMVS!
All I know is the first thing you should do is get rot on board to provide signed photos of himself half naked with neo games! $1000 - 55 shells and Rot will film a special naked birthday greeting for you and send it to you on your birthday.
edit:
Ok no seriously, I just had the best idea... a lottery.. a very small number of the cases will be filled, at random, with ACTUAL GAMES when you receive them. Most of the games are shite that is ultra cheap but SOMEWHERE there is an ultra rare copy of something, and anyone can win it! Except that the more cases you buy, the more likely you are to win!! Shoot who wouldn't drop for a few cases if there was a Twinkle Star Sprites randomly floating around in one of them? Maybe you can get NGdev to donate something? A special kickstarter only signed copy of Gunlord sent off to some random backer inside of one of the shells would be pretty hot.