Everybody loves a bargain, and football's no different - notice how it's impossible to mention Michu without first referring to his price tag - just £2m!
So, who are the some of the potential transfer bargains for this summer? There's a few candidates, but we're just going to be considering a select group for starters here.
None are quite as dramatic as Michu. But then, nobody predicted the impact he'd have on arrival from Rayo Vallecano.
Instead, we're focussing on players who's price tag has them undervalued - at least in our opinion.
Here's a few we can think of straight away…
Thiago Alcantara | Barcelona
That release clause. What an opportunity for Manchester United, or any other Champions League team in fact. The chance to get a potential world-class midfielder, schooled at Barcelona, for as little as £15m.
That's because his lack of playing time at the Nou Camp triggered a clause in his contract dropping his release fee from €90m to just €18m. This kind of discount doesn't come round very often.
It's a snip compared to what you'd be expected to pay for an established name - the likes of Luka Modric to Real Madrid for £30m+ immediately springs to mind.
Alcantara has the ability to become one of the game's most exciting central midfielders - a position United desperately need to fill. It's a no-brainer.
Jefferson Farfan | Schalke
Reports in Turkey claim Schalke will take as little as €6m this summer. He's out of contract at the end of next season, but he's just 28.
30 goals in 142 league games is a solid record for a winger. And last season he led the team in goals contributed (goals + assists) - 12 in total.
Liverpool have been linked in the past, but in truth any Premier League team outside the top three would surely take a look.
Keisuke Honda | CSKA Moscow
Another player entering the final year of his contract - the Japan international is available for around £5m, according to reports.
He's come close to moving to the Premier League before, and would reportedly welcome the opportunity to test himself in England after three years in Russia with CSKA Moscow.
New Everton boss Roberto Martinez has been strongly linked with the player, who starred for Japan at the Confederations Cup this summer in Brazil.
Julio Cesar | Queens Park Rangers
The relegated side aren't in a great negotiating position. Loaded with international stars on sky-high salaries, they will have the cut the wage bill, and hard.
Cesar is one of those expected to leave, with the big clubs sniffing around for a bargain. And one recent report had Arsenal set to pay as little as £1m to sign the keeper.
That would be extraordinary. But even if the true figure is slightly higher, it would still be a coup for one of the world's best shot-stoppers.
Younes Belhanda | Montpellier
At that point, Arsenal were strongly linked following a memorable season in which - alongside Olivier Giroud - Belhanda inspired the south coast team to the Ligue 1 title.
But now, after a less than stellar season, the Moroccan international wants to move on - with the Premier League his preferred destination. Aston Villa are thought to be interested, while Wenger said 'I love this player' earlier last year.
He's been compared to Robert Pires, and openly admitted he thinks Arsenal are a great club. Sounds like a match made in heaven.