Robin van Persie is finished at Manchester United and should be sold

Van Persie hoping for new United deal (1:22)

Robin Van Persie has revealed he would like to extend his contract at Manchester United. (1:22)

Robin van Persie has just one year remaining on his current deal at Manchester United -- he looks finished and it would suit both parties if he moved on.

He came to United to win the title and he did exactly that. The fans will never forget his last-minute strikes against their rivals, his wild celebrations whenever he scored a big goal and his decision to pick Old Trafford over any of the other destinations available to him.

But there won't be many supporters complaining if Louis van Gaal deems him surplus to requirements this summer and opts for a younger, better striker to replace him.

When you consider the debate surrounding David De Gea over recent months, it highlights how irrelevant the Dutch striker is in comparison. The goalkeeper is United's most important player, like Van Persie was a few seasons ago, and there is a real sense of desperation to keep him. Most United supporters are fairly indifferent to Van Persie, though, with many happy for him to be sold this summer. That is in stark contrast to their feelings for him when he first arrived.

Thanks to Van Persie's goals, United won a 20th league title in his first season at the club, and eight months after leaving Arsenal he returned to the Emirates as a champion. His former teammates applauded him on to the pitch, forming a guard of honour for United.

Since then Van Persie has endured a fairly rapid decline, with injuries and poor form preventing him for recreating anything like the success he enjoyed in his debut season. It's a good job he wrapped up the title he craved when he first arrived, as he's done little to inspire the club to success in the two years that followed.

Under David Moyes, the striker only managed 28 appearances in all competitions, but still recorded a fairly impressive goal tally of 18. But it wasn't enough to save United from the humiliation of finishing seventh in the league, and Van Persie looked utterly fed up. He missed two months towards the end of the season but returned to training days after the manager was sacked.

With Moyes gone, he cut a different figure on the pitch and was all smiles off it too. "We'll be back, trust me, we will be back," he said with a grin, following United's final game of the season.

"Trust me. Save this interview!"

It seemed Van Persie knew something that we didn't and when Van Gaal was named the manager of United two weeks later, it was obvious why the striker was so happy.

Van Persie was Van Gaal's captain for Netherlands and they had a great relationship. After looking frustrated and unhappy under Moyes, United fans were now looking forward to the return of the Van Persie they knew and loved. The idea that in a year's time supporters would have no issue with him leaving the club would have seemed ridiculous. The anticipation for what he would go on to achieve in 2014-15 was huge.

On the opening weekend of the World Cup last summer, supporters could hardly believe their eyes when Van Persie scored that incredible diving header against then world champions Spain.

This was a false dawn, though, as Van Persie has been even more disappointing this season than he was the one before, despite being given plenty of undeserved playing time by Van Gaal. The season wasn't a complete washout for him, thanks to the 94th-minute equaliser against Chelsea and a goal against Liverpool at Old Trafford, but 10 goals in a season is a poor return for a striker at a club like United.

United only started to look like a half-decent side when his injury meant he wasn't available for selection. It was only when he was ruled out for two months after picking up a knee injury at Swansea that United started playing good football.

The wins against Manchester City, Liverpool and Tottenham had people talking as if United were a strong contender for finishing second in the table, yet when Van Persie was leading the line, the discussions centred around whether United could scrape in to the top four.

He can leave United on a free in a year, so there might be some temptation to organise a transfer now so some money can be recouped.

You would presume that Van Persie has a decision to make about whether he will play second fiddle at United for a season before leaving on a free transfer or whether he'll make the move now in a bid to get first-team football.

If not for Van Persie's relationship with Van Gaal, you would presume the striker was certainly leaving this summer. Next year's European championship will likely be his last international tournament, and he will know that playing a role at United like Radamel Falcao did last season is no use to him.

United fans will be hoping that the club sign a striker or two this summer, and for the wages Van Persie is on, they should have a striker who offers them more.

Van Gaal gave Van Persie plenty of chances in the season just gone, desperately wanting him to recapture form of days gone by, despite him playing dreadfully. Only a handful of players had more minutes on the pitch than Van Persie, so maybe the manager will try again next season. If Van Persie is presented that option, he may be happy to continue.

New blood needs to be brought in before United can even begin to entertain offers for the player, however. And with Van Persie claiming the club are ready to spend £200million, his exit seems likely.