HI Simon, thanks for the response. I'll ask at my local shop again, but I'm pretty sure they don't have the swatch book (I know they've got the swiss Ilford inkjet book because I've looked at it there). But they're the only retailer around here that sells darkroom paper or chemicals at all.
Besides them, there are 3 serious film-sellers (two are the only remaining E6 labs within 1000km), and another few camera shops with a few token rolls of film (not counting supermarkets selling unfridged Gold400). Not much but we're actually doing better than other state capitals compared to our size.
So if they don't have the swatch book then noone else around here would.
It sounds like the sticker option is out then, in which case it'll have to be multiple bags (come to think of it, I peeled a sticker off one of the Moab papers and tried to print over that, it didn't work and the colours actually changed. If something damaged the emulsion from pressure that's just as bad, especially when you're trying to showcase stuff).
I'll also presume you can't / won't want to just print on the back of the paper either just for these special samplers (as you can't print on the back of all of them like Crystal Archive does, that'd ruin the ability to contact-print paper negs).
So yeah, I see your point, it does sound like a sampler-pack would just price itself out of the market, especially with all the hand-loading multiple bags into one box and all that.
The only viable thing left that I can think of is just smaller and cheaper boxes.
For example, a 25-pack of 5x7 regular MGiv is only $10 at B+H, but the cheapest FB cooltone is $24, FB warmtone is $30, Art300 is $30, and Galerie is a whopping $48 just to try, all of them are in packs of more of bigger size sheets.
Maybe instead of a sampler, it might be worth investigating just some smaller packs of smaller sheets, like 10 - 25 sheets of 5x7 or 8x10s, whatever gets you within the $10-15 mark? I regularly cut up smaller 4x6s and 5x7s for test strips, so nothing would go to waste if I decided I liked it and bought bigger sheets.
They'll probably have low sales and tight margins, but if it's the gateway-drug that gets someone interested in a paper that wouldn't otherwise be, it could lead to more sales down the track. (But that's for your BDM and Marketing to decide, don't listen to me, I'm just the Engineer with the wild ideas

).