I havent bought a player in a last minute hurry, I counter your many, raise you with most users do not buy players for one game.
I think you severely underestimate how often this happens. I know teams that want to do well in the cup that have bought players in a rush to try and secure a victory. More commonly is the last minute rush before playoffs where many people are trying to get a last minute superstar to increase their chances of promotion, or simply to avoid relegation. Hence why prices are often so much higher during the week before playoffs.
Which is good because the constant listers can list once a week
So what you are saying here is you don't mind people constantly listing "overpriced" players as long as it is only once a week? If listed players couldn't play then even managers who are listing at a small starting price will start listing him on tuesday after the league game so that the player (if not sold) will be available for the next game. This will give an unfair advantage to managers that are available on friday nights to buy players, or more importantly, it will disadvantage managers that aren't able to be on BB on friday nights. The TL isn't supposed to be like that, there should be players of quality standard available all day every day for whoever wishes to purchase them.
You seem to keep referring to newbies as if they are the only ones that have overpaid for a player. I don't consider myself a newbie (although you may consider me one) and I have overpaid for players. I overpay because if there is a particular player that I want to buy then I will buy him and I don't mind overpaying for him. It may be that he is an Australian player with good skills and would drastically improve my team, in which case he is worth more to me then it would be worth to you. So does that mean I am overpaying? I don't think so, I am paying what I think the player is worth, just because it is more than you think it is worth doesn't mean I am overpaying.