It's been my experience that most sales on bst have the price included in the price of the razor. One exception I can see is for our friends overseas or over the border.
Cheers.
Oh. Well, it's up to the seller, really. But, typically buyer pays first. I mean, if the seller has something and they want to make sure the buyer likes/ wants it, they can hold on collecting payment or what have you. You're at your own risk, but do it as you prefer. The majority of buyers send payment first.
I think the only time it would make sense to ship first is if it is an international shipment where the buyer aggrees to pay actual shipping cost. It can be hard to estimate international shipping.