Think of the money spent as an investment, rather than a loss. £400 isn't exactly loose change but having the work done will give you a pukka car that's solid, looks great and is worth £XXXX. Don't spend the cash, you've got no MOT and an unusable car with a value of £XX.
Unfortunately as we've all found out, owning a Mk1 can be an expensive experience. However, what we are actually doing is preserving an increasingly scarce bit of true motoring history and having a blast driving the thing as well.
Does your car put a silly smile on your face everytime you look at it or drive it? Do you get a funny feeling in your tummy when you catch a glimpse of your ride in a shop window as you cruise past? What price can you put on that? From the pics on here your car looks amazing and you should be very proud! Would you feel as proud (and slightly smug!) in the equivalent age XR3, Astra GTE, 205 GTI? Nah, me neither!
Think of the summer, the shows, the meets and the whole dub scene and how you're doing your bit to keep the GTI spirit alive and it's money well spent.
This may sound all philosophical and stuff but don't get down about it, we're in this together!