Yes the Kay's Catalogue was held in the Radio Room and often borrowed by 'potential customers' who never materialised an order. (But the simple check to their motives was just to drop the catalogue on the bench by its spine and see how it flopped open. (That's Cheltenham training for you ....
))
The worst part of the whole effing business was explaining to the crew that the Sparky DID NOT get a commission from Kay's Orders. Although I think you got a book voucher or some such thing if you sold the entire contents of the Kay's Catalogue within a week of joining the ship. About as likely as being hit on the head by a previously unnoticed incoming galactic cluster, or meeting a particularly nasty Tyrannosaurus Rex on your way home from the pub at night. (Although I can't deny the latter has happened to me, sometimes three times on the same night
)