Seems sort of like something that should only be special ordered?
I think supply has definitely changed a lot since then, you rarely find places selling it anymore (like you stated) and I'm pretty sure those prices that we find online are from nearly 5-10 years ago, so it may be deceiving. In addition, captive bred cuttlefishes are far more superior in many aspects. Oddly I found an article stating that LiveAquaria was selling a pair of S bandensis in 2014 for $399? I think this just shows that the price of these guys are really supply sensitive because of how few people want them, so if you end up breeding way too many your price with plummet.
No one can ever accuse ReefGen of sitting on their laurels as they blaze a new trail of captive propagated marine life, this time in the direction of our Ceph Overlords. Sepia bandensis is one of the…
reefbuilders.com
I'd feel like at the very least it should cost a little more than the eggs themselves (which I think usually go for around $15-$25), just for convenience. Maybe around $30-$50 for a live food eating one, and more for a frozen food eating one? You could even charge extra for mated pairs. I think maybe you could also offer to sell some live foods, maybe captive breed some saltwater mollies, nothing too huge because I imagine most people would go to the pet store for live foods after they buy from you. I do think if you shouldn't offer them for too low, or else you'll shoot yourself in the foot with price expectation in the future.