I'd say keep it... I've toyed with the idea of a MK7 GT, can't get a decent spec one for less than 15-16k (all I want is xenons ect!) my GTi's only done 61k on a 2005 plate, 11 VW service stamps, Brake fluid every 2 years, Cam follower changed, Diverter valve changed twice, full Powervalve Prestige System with wrapped downpipe, timing belt & water pump changed in 2009 & 2013, Michelin Pilot Sport 3's all round, Kenwood DNX525DAB... Basically everything is bang on no expense spared!!! ect...
May as well keep it, runs fantastic, dealers wouldn't want it or give and insulting price so sod it!!! Only done 30k miles since 2009!!!