Penguin also do special offers when you're a new member (usually 10%). Keep your eyes on your email!!!
Only thing to watch with imported magic is that a few times, my orders seem to be intercepted by the UK customs and excise, who slap a relatively heavy penalty on the goods.
Penguin overcame this by putting 'Magic Samples' on their international shipping label. This way, the C&E dudes know that the items inside are unlikely to be for retail, and don't bother opening the box.
Also, before ordering from Penguin, get your shopping list together and send a mail to
pastamagic@aol.com for a quote.
The guy there is Frank Riposta, and he's been in the business for years. He'll undercut Penguin's prices, and although his shipping is dearer, it gets to you within a couple of days intact. He's also quite good at sourcing things you can't find elsewhere. (and it's STILL cheaper than most UK stores).
Tell him
seige@mac.com gave you the tip off, he'll look after you!
But don't forget your friendly UK dealers ... (eMagictricks et al). They stock a wide range of items and most can deliver next-day...