A few people have been scammed on the site, Only use paypal to pay for items for sale by other members. If they will not use paypal, its likely a scam NEVER SEND E-TRANSFERS OF ANY KIND.
Here is my solution for extra fuel for our ride from Seattle to Dead Horse this June.
This is on my wifes GS500 and it's 1.5 gallons,the one my X is 2 gallons.