Below is a cross-section of reactions from journalists and Arsenal fans last night after the deal was announced.
@piersmorgan: What a sickening betrayal of Wenger too - the man who stood so loyally behind @Persie_Official through years of injury. #VanPursestrings
@DavidJonesSky Honestly think the RvP transfer is just the spark the Premier League needed post Olympics. Football is coming...
@ollieholtmirror Van Persie signing big statement from United. Blow for Arsenal, obviously, but still think they can have good season.
@henrywinter I hope @Persie_Official has the class to thank Wenger for taking a gamble on him in 2004 when others wouldn't & backing him during injuries
@lukeyhills No way could @Persie_Official do two seasons on the trot! It's only a matter of time before his knees give way #AFC #Arsenal
@DutchGoonerCov @Persie_Official I guess this is it then. I won't insult you, I'm Dutch. Goodbye. I would say good luck, but not for that team. No way.
@ahmed14ali This is officially the worst news I've heard for 15 years ! I thought @Persie_Official was different to the rest but ... Oh well #gutted
@leebyron To be fair, its going to be pretty sad hearing @Persie_Official get the same reaction from the crowd as Cole, Nasri, Ade after last season..
@colemikori Hey @Persie_Official I'm a gooner from America and you just made me very sad. Your exit is just as typical and equivalent to that of Nasri's
@D_Tiller RVP has gone....we have bagged £24mill!! Go get Llorente!! We HAVE to!! #RVP #Arsenal #Llorente
@simbizhanje As a staunch #Arsenal fan, RVP has committed the ultimate betrayal.
@premy97 I really don't blame Van Persie for leaving but I really don't think people should offend him as much, he is not like Cole and Nasri
@stlawal Arsenal will be underdogs in every game now, but that will work in our favour, RVP is world class but glad the saga is now #OVER
@gooner1886_ I'm glad that the Van Persie saga is over now but I only wished he didn't join another PL team!! I feel angry & let down by Van Persie!
How do you feel about the biggest transfer of the summer?
image: © lukask