You can use paysafecard to pay with a third party service “skrill.com” all you have to do is make a free account (no postal confirmation needed), add funds via PaySafe to your skrill account and make a payment to this email@example.com (do not get irritated by “paypal” in the email).
The price is the same.
For paying with skins, the skins price needs to be $36 on OPskins (http://opskins.com/). (sellable and frequently appearing price, usually close to average price)
Since we are interested in receiving money from selling a skin it doesn’t matter to us which skin it is.