I can understand that 220 film doesn't get as many SERIOUS users as it used to(pre-digital days when film was THE capture medium), but TBH, a massive markup over 2x120 rolls? I mean, a few pro-packs of 120 and some extra cash and you've paid for a really clean extra back(or backs, depending on your system) to use pre-loaded for when the going gets heavy !
If 220 E-6 were still available new, I'd be buying it. I shoot enough of it to have it not sit around. I like the convenience of not changing film backs that often. But I'll suck it up and shoot 120 if the cost savings are worth it, and right now they are.