Hi Hans-Peter
No I do not agree with you.
You have something which might be of interest of other people and you offer this for sale. (zB on eBay)
It is (from the potential buyer point of view) not really interesting to know if you got the item, which you are offering, for free of that you have to pay a sky-high price for it.
What the buyer will consider is :
1) Am I really interested in the item (do I want to have it badly or not)
2) What am I willing to pay for
One item which is nice to mention is the free eurokit everybody (above a certain age) here in Holland has received. Again, for FREE.
How many times is this "euro-item" offered for sale, for auctioning, for swap etc etc ?
Thousands of people have payed 10 euro and more to get this kit because they were interested to get this item.