First season, what is next?

[the_answer]

is there any sense to sell average players in the end of the season when they cost more before they lost stars and skills?

[Tactician]

is there any sense to sell average players in the end of the season when they cost more before they lost stars and skills?

On the finance side of view, it is better to sell players at the end of the season. Also, selling some high quality, but old players can provide additional advantages. You can sell some players, but do not sell so much that you will have trouble to play the first few matches of new season. As a guideline, you can sell the players that are 'duplicates'; keep at least a player for covering a position in 1-2 formations that you will likely to use in the first games next season in case you will not be able to get the desired players from the market in the first few days of the new season. Selling more players, for example if you have two players for the DL position and 2 players for DR position, and you sell all four of them is big risk. You might not be able to get a proper DL and a proper DR in the first few days of the next season. This will also cause you to go into bidding wars. The same applies for the other positions. And surely, don't do that for the case of GKs; if you don't have any eligible GK for use for the first Cup match, you are almost guaranteed to lose that match. You definitely need to sell the players that will likely retire in the next season though (usually 30-33 years old), especially if you are low on virtual money, unless like I have said, in the case where you don't have any cover for the particular position for the start of the next season.