The XRV is one of those bikes I liked the idea of but never owned. It was reasonably successful in Europe but never officially imported into UK. I did look at buying one a few years back and I am not an expert by any means.
The shaft drive is reliable but the early red colored engines had some shortcomings with bearing failures, cam pitting and sometimes high oil consumption they also had some overheating problems.
The later black engines apparently had these issues sorted.
It is also fairly heavy bike at over 200 kilos, not sure exactly.
I don't know what you have planed for this bike but I think it would make a useful travel bike in the hands of the right owner. It is quite old, but don't let that alone put you of. I think they where made between 1983 and 86. You may find spares difficult to locate.
The Transalp is a useful travel bike, it, been in production for nearly 20 years and spares are plentiful and they are almost trouble free, the very early ones had some high oil consumption problems and the 600 is know to have CDI problems but apart from that they just go on for ever. They might be in the shadow of the Africa Twin but I think it is equal in most departments and better in some, the AT may have more street cred than the TA, but that's worth nothing when you traveling around the world.