At the moment there are 7 QLs for sale on ebay, on auction with starting prices from 0.99p to £125-00 for buy it now. There seems to be a lot of QL interest although QL users, Quanta and QLToday all now seem quiescent. I recall reading in one of the QL magazines that Jan Jones book was now unobtainable. Have a looks at :
Someone has been busy. Legal or not there is Jan Jones book amongst others in .pdf format.