There are wide variations in price: some advance purchase sleeper only fares are cheap; at the outside a full-price Anytime ticket plus a room supplement to use

There are wide variations in price: some advance purchase sleeper only fares are cheap; at the outside a full-price Anytime ticket plus a room supplement to use the sleeper could cost a fortune. And pricing is not straightforward once you start digging in: have a look at http://brfares.com/!expert?orig=EUS&dest=FTW http://brfares.com/!expert?orig=EUS&dest=FTW for example...