Hi Jean,
It's for technical reasons I'm afraid.
CM now has what's known as a SSL (basically a security certificate) to protect anyone using the site from hackers - you'll notice in your browser address bar that our web address now starts with an https rather than just an http, the 's' stands for secure. Using this certificate means that information displayed on CM from elsewhere has to come via equally secure methods and the component I was using to display those motorhomes for sale is not able to comply with the security requirements at the moment, so I've removed it... for now.
I've been in discussion with the developer of the particular component and there may be some progress in the pipeline, if so I'll reinstate it. In the meantime the same information can be found by searching ebay but its a bit of a long-winded method compared to the way CM displayed the information.
Sorry for any inconvenience but users online security is high priority on here