I agree with that but how do you 'conceal' the fact you've just sold a player for massive pessos and you're (desperately) looking to replace him. Any potential seller would know that and price accordingly
I think supply and demand still has an effect.
Let's say we get given for examlple £100m just from some seriously rich billionaire. He says to go out and spend it with no worries. So we identify some targets. We identify a central midfielder, who has certain qualities, experience and has proven himself to a certain level etc, and the market for similar players has been set at something like £10m based on recent transfers.
We could make a bid of say £7m to start off, and the club goes 'no, we want £25m'. We might then increase to £10m. We might then even increase to £12m. We might even then go even further and increase to £15m, because otherwise we lose the competitive advantage that the money gives us. But if the selling club takes the tinkle too much, there will become a tipping point where it simply wouldn't be worth our while to pay the price they are asking, because there are other players in the world who we could get for a lower price. And then it presents the risk to the selling club, they are turning down a potentially very good deal, keeping an unhappy player and forfeiting the opportunity to strengthen because they got too greedy.
I think if it's obvious that we had loads of money, there may be a slight price increase, but it doesn't mean you have to get completely taken to the cleaners (unless you are Liverpool). Look at City, they initially started off paying massive fees but there comes a point where the selling club simply can't demand something too ridiculous because if the player wants to leave and the offer is good, and they try and amp it up even further, they risk losing out all together. They got Dzeko for a reasonable fee for example, and I think we'll see a lot more of that. They want to show the other clubs that just because they have serious backing, they won't be bullied into paying big fees. And once that's established, clubs will realise that they have to be realistic with them if it looks like the best option is to sell.
I understand that Liverpool needed a replacement, but if they knew Torres was going that January, if they sold him for less and spent the money on 3 or 4 players with a week to go, they would be in a far better situation than they are now.