Okay now that I have a minute ... Minimalist cases are, cost to me, 38% of a full case, and extended minimalist cases are 56% of the full thing. Full hand is still 10% more than classic, so presumably that continues for the extended and plain minimalist cases. So, minimalist roughly $28/$43, ext-mini, $35/57 I think...
I may have over-guessed PP's cut, above, but that would be a matter of a few pennies not a whole dollar.
Due warning, I had troubles getting stainless steel out anywhere near my stated shipping cost last time. So, we'll have to assume the medium flat-rate box within the states, which is 12.35 plus something for packaging materials (which as some of you noticed was yesterday's newspaper; fine for CONUS flat-rate not so nice for int'l because of the density of paper products. At least it was more recyclable than packing peanuts).
International, I have a few routes. If it crosses 4lbs (including box & peanuts (which are hard to find so I reuse bubble wrap) and metal) then the flat-rate 20-lbs-or-less box is still cheaper, but often $60USD or for most of Europe, $67+. But under that limit, use-your-own-box is often around $25, but still $30-ish to Europe (and not Australia don't ask me I'm not a postal worker but anyway) two full classic cases, in aluminum, will come uncomfortably close to that line; A full hand aluminum case with a 9-copy spacer kit is usually less than that. Two cases with one or more spacer kits will cross it.
Sometimes I can ad-lib, in the form of chintzy packaging. Peanuts, if I find them ... flimsy envelopes were used once, and I hear it all arrived still within the packaging. But do you really want slabs of metal tied together with breadbag twistties in a plain envelope crossing the pond and being manhandled by your postal workers over there who are mad they can barely read the CN22 form let alone the address? ...up to you, my friend.
The way shipping over here works, if I call it a parcel I automatically get a tracking number. Now, last run when I was taking 4 boxes to the post office every day and entering tracking at home, near midnight before I went to bed, I'd mis-enter some numbers and I got a couple panicked PMs that the tracking number they had (following the link in their Paypal email notification) said it was going to the wrong city ... but if you log into paypal and track it, I'd corrected the number by then. Due warning, I mis-enter stuff sometimes but I think everything has gotten to where it was going -- even Witbliz, whose address looks nothing like what our poor overworked mail delivery folks here are used to seeing or entering into their PCs.
Okay enough of me yapping, how interested are you folks at getting this metal ergodox case...? (yes, I've a question in about 3/16ths spacer but haven't heard back. likely the whole kit will be roughly as expensive, but fewer pieces, as what I've quoted above). I think if we get 10 case orders, it's worth making a group by, and I'm pretty sure we're about half way there now....