I paid £800 for a 1988 BMW E30 325i Touring with 155,000 miles and a FULL BMW service history - it goes like stink (170hp) - get loads of stuff in the back and it looks cool too (IMHO) - I looked for ages when I first got the bike and for under a grand E30s are the way to go!
I know of a couple of them for sale with good histories for similar money...