Gucho, first off congrats on your new baby. It looks like it is in great shape and as Franswa has so wisely stated I wouldn't worry too much about the roof if there are no leaks
I have been following BF sales online for almost 2 years and have NEVER seen one in such nice shape for $5000 CAD. In fact I have seen a couple "project" trailers in much worse condition for that much or more. As other have said rest assured you got a great deal!
Can I ask where you first saw it for sale
? Was it on Kijiji? or was it just one of those wonderful coincidences where you saw a for sale
sign in a driveway? Just curious.