Good bit of detective work there mate.
I can understand reluctance to answer emails, as serious buyers will call if the message goes unanswered. Selling unusual stuff online without bothering to give any details (especially about the V5's) is an interesting strategy though.
Having said all that, and assuming there are V5's, if I was looking for a car and had the space I would have a punt on this, if you could sell-on the bits you don't want you could end up with a very cheap car with an intact windscreen if you are lucky.
Hmmm a lot of
ifs in that sentence.
Shame that Mrs B has ruled it out for you :-)