How very droll! "An extremely rare GTD70 brochure" Looks a great piece of period artwork on the cover too.....
I also have many "extremely rare" printed items around the house, such as a Delia Smith Cookbook from 1983 and a 1992 South West Trains timetable... I think I'll put them up for auction on fleabay too.
"ULTRA Rare and one for collectors. Grab this while you can... "
Yes, of course...rockonsmile
Now a manual, that's entirely different....