Susan,
The rate can fluctuate as much as 20% over a year's time: currently multiply the GBP price given X 1.8 for the price in dollars.

My credit card company doesn't charge any fee for paying in sterling or Euros but some do.

Keiko

When I googled it, I noticed the fluctuations, so I was wondering if that's the case at all times. Guess it is. I'm kind of reluctant to do that, and I'd need to find out if my CC company charges fees or not. In the meantime, I'll probably stick to the US companies. And I really wanted that Z. rehmanni. Wah!!!!

Susan