Wigan as a team is just following what other "smaller" clubs are
doing to the "Bigger" clubs that's all.
Spurs knowing that their players wanting to go to a "Bigger" club
like Man U, up their price but not just for that purpose, partly
also because they wanted to keep Carrick badly as he was their best
player last season.
Now it seems like wigan is doing exactly the same thing to them
with Chimbonda... 
Its begining to look like what goes around comes around... as if
you compare, Spurs is a bigger club than Wigan so Chimbonda
naturally wants to join a bigger club... And to think that Wigan is
asking for $5 to $6m for a coming to 28yrs old player they got
almost free and not viewed as a top rated player is a bit too much
still.
To say that no one wants to join Wigan is a rather exaggerating
statement, thousands of youngsters across England and Europe would
be more than happy to get a chance to join a premier league
club.
Btw, your example of Man U is rather strange... You pick players
like Yorke, Cole, Forlan, Djemba-Djemba and Bellion.
Yorke & Cole were rather old already when they were sold (Past
30)... They left cos they knew they were no longer first choice
when RVN came in and they won't get to play regularly.
Dwight joint Man u in 1998 for 12.6m and was sold to Blackburn
Rovers for $2m in 2003. He was given a chance to join Celtic in
2001/02 but he decline preferring to stay back at Man U.
Andy Cole joint Man U in 1995 for a fee of $7m from Newcastle
United and since he was not being played as RVN was then first
choice, he left at the end of 2001 at the age of 30... also for
Blackburn Rovers for a transfer fee of $8m.
Forlan... well, what can you say. 27 match without a goal for a
striker was too much. He just showed that he wasn't able to adapt
to the English game thats all.
For Djemba-Djemba, he couldn't live up to the billing so he had to
go, simple as that. And Bellion, well he was a potential... but
potentials don't aways live up to expectations right.
As for your players rejecting United: Berbatov, Zakora, Obi Mikel,
Ballack...
Berbatov & Zakora joint a club where their best player carrick
wants and did joint United and they were guaranteed first team
football at spurs where they will not get at united...
Obi Mikel... what can we say, best deal for united... $12m free
money.
Ballack... you forgot to mention he turned down Real Madrid, Inter
Milan & Bayern Munich as well where he was worship like a hero
cos no other club could offer him the most money apart from
Chelsea.
And you asked, How many players have they attracted to join
United... Well, all i know is definitely more than Liverpool. If
you want to say players not wanting to join a club, why don't you
mention Liverpool? Mikael Silvestre, Alan Smith, Nemanja Vidic...
all were Liverpool's targets, all had offers from Liverpool at that
time but they rather joint Man U than Liverpool.