John -
I've sold numerous images to greeting card companies. I always specify "greeting card rights" and sometimes limit it to North America, or occasionally for five years, allowing me to re-sell the images to other markets or at a later date. It's been a while, but I think that I got a general contract out of the "Photographers Market" book that's published every year and re-worked it to suit my needs a bit.
As far as pricing, if you go to Getty Images and look up a rights-managed image, you can answer some questions about what it will be used for and it will quote you a price. If I don't know what to charge, I generally look there for an idea of general market prices.
Hope that's of some help.
Jodie
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