I know mate, I'm not going to put myself out for 'maybes'. People can do basic maths and figure I dunno, perhaps a 10% discount on 10 sets, 15% on 20 sets and so on. So 10% off stands you at $400, x 1.23 for UK duty and VAT = £302. Shipping from the US and UK mainland on top. So if people decide ~ £350ish all in is going to be too much, they can duck out.
Perhaps it's just a sign of the times. We sold over a 100 sets over two GBs last time!
Anyway, I have asked Bill for pricing on 10, 20, 30 sets etc. And yep, I was also thinking it could be done through Stealth as they have the buying power and accounts already in place and can also include a mapping deal as you say!