I know Outlaw sells through AV123.com -- haven't ever heard about them using onecall.com. Considering how big onecall.com is, I'm guessing it's OK -- the price is right, and onecall.com's too big to try buying up B-stock from Outlaw and selling. And I just noticed a "Special Order" link on that page -- pops up a little window that explains that onecall doesn't actually stock 1050's, but will order one for you.
Hopefully Scott can drop in and confirm it, but I'm guessing it's OK. If in doubt, you can always to straight to the Outlaws to order, though -- it'll probably be faster, since it sounds like onecall just turns around and places the order with them anyway.