You're not going to find anyone on this forum that will accept paypal from you, merely because you have 2 posts+no vouches. Sorry but it isn't going to happen.
Consider buying RSGP from a goldsite (Bogla/Divica/Probemas/R2) then paying with that, because as your Sythe account stands you've got about as much chance as paying for a rare name with Paypal as I do becoming Admin tomorrow.
Gl buying.