thanks rob.
i'm going to wait until i've finished my 3rd year exams (4yr course) and so i'll have a bit more time, i'll then sell the E21 after 3 years of ownership and hunt for a 525i manual, preferably sport.
as you guys know, i've been pondering about an E34 for quite a few months now. but i didn't because i didn't want to sell the E21 and find i didn't like the E34 for some reason. now i've been fortunate to drive one and i really like it. it's so much more refined than the E21 and much more practical. it's just the fuel economy of the M30 puts me off. going steady i can get high 20's, but around town it's absolutely dreadful

cold start and pootering around town earlier quite slowly was about 11mpg. wonderful engine and so smooth. i know the 525i is a tiny bit slower and revs a bit higher, but it's still going to be a lot more relaxed than my E21.
i know i'll be in no hurry to sell, so i'll probs put it up around april time, and i wouldn't want anything less than £1500. that should buy me a decent 525i.
honestly, i can't tell you how much i love the E34.
another major influence is how easy the parts will be to get hold of, E21 bits are becoming a bit of a pain now in some cases. i can imagine E34's, being the best part of 12+ years younger, will be much better.