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.
I just saw the other way than Dale's to solve the "tank under pillion seat" issue: Facebook
(Disclaimer: I don't have anything with the "product", and I don't even know the "author")
Very good idea. It's really only the width of the bags. I measured mine the other day as I am looking to put a shot gun case across it width wise. Mine is about 36". That rack has me thinking