Well mate, I do not mind if you believe me or not. It works for me and I am not rewarded by Nordeus for writing that.
I sold two 2-star players and one 6 stars. So, this works as well.
A bit annoying though as it's obvious those are "artificial" sales and the players were not bought by humans managers.
The 4-minute period is also very frustrating as I had to try 8-9 times fo each. I think this will be solved in the future by minor update allowing us to put for sale a player automatically until he's gone.
Finally, as I mentioned elsewhere: I do love this update very much. Let's hope the quality players presently available for auction are not a kind of temporary bait that'll eventually disappear.