The way I look at it, I had an original 318is Boston Green M-Sport, Irish car and completely standard with fresh NCT. Took me a few weeks to sell it and got something like a €1k for it. Same car today would be up an hour and sold at that money. Would be at least a €2k+ car now. And that wasn't a once off either.
That would be 5 years ago next Jan. (I bought my Silver E36 the week before the green one) Recently say the Boston Green still in use
Ok their was big money enthusiast 318is a few years back, but normal average E36 wernt as strong as they were now.