I bought a few in May, and then a few more in June from Botach. As of today, they are $49.95 for the 50 rounders.
Yes, I know that Botach has a checkered past. I did have some small problems with timely shipping on the second order (paid for 2nd day air, and got them a week later), but even with the $10.00 shipping, I got a great deal.
I also ordered the shell catcher for $39.95
Everything came as expected, extremely well packaged and protected, with the only downer being that the magazines did not get shipped in the original, blue, FN cardboard boxes. They were each separately bubble wrapped, and then the wrapped magazines were bubble wrapped together and put in a mailer. Prior P90 magazines were sent bubbled and placed in a large cardboard box along with the rest of my order (larger items).
Pay with a credit card, and if there's any problems, call the card company to handle it.
I would also recommend that a few days after you place your order, call them to verify that it was shipped out. That order I made that was delayed, for some reason didn't get to shipping until 3 days after I placed it (and spoke with a customer service rep, who I assume then expedited it)