Disclaimer:
Since there are always problems with fraudsters who think they are particularly clever, I would like to take the liberty of pointing out the following on my own behalf. Just because Ebay offers buyers the opportunity to return purchased goods
 if they are not to your liking, does not mean that 35-year-old electronics have to function perfectly like new goods. No thrift store on this planet gives buyers any kind of guarantee that the purchased goods will work. So if someone buys an 
old camera in my Ebay shop and I marked it as "used", it doesn't mean that all functions work 100%, just that I've tried whether you can switch it on and trigger it. It would also be completely pointless to carry out a full functional test, because 
if the camera then waits a year or even longer for a buyer in my Ebay shop, its functionality may have changed again long ago. An example of this: I got a brand new, unused Fujix DS-560 from a well known Fuji manager a year ago. The camera 
dates from 1999 and was not only brand new but also fully functional. Now, only a year in my display case, she doesn't make a peep anymore, all dead, without being used! However, there is of course the possibility of having each camera 
serviced before it is sold, no question. I have a very experienced technician on hand and if it's worth 400 euros to someone, no problem. Then he gets a freshly serviced camera with a 6-month guarantee on all functions. If someone buys a 
camera despite this disclaimer and then complains that it is not fully functional, I politely point out that I must of course accept the return due to the applicable Ebay guidelines. The buyer then ends up immediately on my list of blocked bidders.