I noticed that on amazon.co.uk paperback copies of The Mirador and Corambis are selling for ridiculous prices. Well if you are in London and want to get some copies, I saw The Mirador and Corambis pbks. in Waterstones Goodge St. at £7.99, and Corambis in Forbidden Planet for £5.99. Not many copies left, 1 or 2 of each.
Also, if anyone is still looking, the used/rare book selling option at chapters.indigo.com has a few copies of The Virtu listed, both soft and hard cover (last time I looked). (Chapters is a Canadian company but the used book dealers who list with them come from all over.)