For those in the US, it's closer to 5-6 Llewellyn decks...Most of those can be had for $20 or less, while depending on conversion rates when you buy, the Tyldwick is right around $100. If it were around $60 USD, I doubt people on this side of the pond would agonize over the decision to buy quite so much.
That said, I agree it's a matter of priorities. I gave up on buying a number of cheaper decks to get this one, figuring that if it didn't work out, I probably wouldn't have much difficulty in selling it here. And I don't regret one bit not buying those other decks, because this one was very worth it!