Well, of course it matters how much they're valued at now, I asked for 10-15 goal a season striker that Newcastle could have signed, those players you named are either valued much higher or wouldn't be sold to Newcastle.
Those are strikers that were bought at a bargain price and successful bargains are rare, as you've found out. As I said, there are bargains to be found, but the less you pay, the bigger the gamble that a player will be good enough for the Premier League. And there are far more flops than bargains, aren't there.
If was as easy as you make out, world class managers wouldn't be signing Gabriel Jesus for £27m, they'd just go find a gem for £500k that's just as good. Why couldn't Grayson or Coleman sign players good enough to keep a club like Sunderland in the Championship?
Are you suggesting any manager who wants to spend money is a chequebook manager? Because that's literally every manager.
I thought that was the norm on here?