Thats old cars for you
Although ive had mine 7 years and its never yet me down once. I'd say stick with it but is seems your comited to getting rid anyway....
I experienced the same thing with my GTI, after a while it runs of out of things that can go wrong, and I've finally had a couple of months of trouble free motoring.
Stick with it bud, summers coming and you'll be glad you did when your hooning around those n/devon roads with the radio on and the sunroof open..