I think you're wasting your time.
A new PB667 is USD:2,499 at the Apple store, in the UK Store it's price is marked as GBP:2,149 (a whopping USD:3137.41).
But the UK price is inclusive of VAT (sales tax), the price without VAT is GBP:1,829 (USD:2,670) so there is really only a difference of GBP:125.00 (USD:180.00). And you want 10%, which makes your price USD:2,750 - more than the UK price.
You may thing "yes, but they can save on the sales tax" - wrong, on import the VAT either needs to be prepaid or will be collected on delivery. The idea of marking it as a "gift" for import doesn't work, I've had people tell me that they've been charged taxes in various countries where items genuinely were gifts.