Well, Royals are very nice, but I sold the only royal upright that I had. It was far too loud with it's 7 amp motor. Royals of the style you like are fairly easy to aquire here so you can find one from someone easy enough. I had planed on getting another one sometime but they are common enough to put on my "things to get later cause they're not going anywhere" list.
Really my collection is so small anyway that I have very little to trade as most everything was bought with a specific reason and won't be traded. I'm sure someone else with a larger collection would jump at the oportunity to get a nice vacuum from England.
Oh, by the way, your collection looks very nice. Do you have any Electrolux cylinder cleaners? I think if you have any of those you could really interest some of us Lux people. They are so different than ours, yet they have key simmilarities.
Lastly, have you considered how to get vacuums across the Atlantic in an economical way. Thats your biggest problem when it comes to international vacuum trading. Makes the whole 220v issue sound quite painless when you have to sell your internal organs just to pay for the shipping fees!