From http://www.poserworld.com/Home.aspx
3 month $45
6 month $60
12 month $80 (with free DVD)
Lifetime $250 (with free DVD)

Half price for 12 month and lifetime with code PWHALF10

If you're having trouble with the pricing at the store, contact
their support. They were very helpful and timely the last time I
dealt with them. For some reason their order form didn't work
for me, so we went past it. I paid using PayPal and almost
immediately afterwards my account was open.