E30 prices won't really start to rise until a lot of the rusty scrap thats still on the roads has been fragged and the numbers have really dropped ( like Mk1 / Mk2 Escorts, Mk1 Golf GTi's etc ).
Andyboy is dead right though. E36 prices are so low now that if you want a 3 series as a daily driver you'd be mad to choose a rusty E30 over a fully specced E36 for the same money.
I sold my 328i Coupe last year for just under £3k - by far the best car I have ever owned. With that in mind there's no way I could justify spending the same sort of initial cash outlay on an E30 - much as I like em.
My current E30 is a long term project - as I think most Zoners cars seem to be. Cost me under a grand to buy and already I've spent a few hundred on it. It needs rear arches, front wings and could do with a blow over respray. Then it needs all the suspension bushes doing, new struts and springs etc etc - thats at least a couple of grand - probably a lot more. I'll do it because I like the car, but it will probably take me Years.
At the end of the day people can advertise their cars for however much they want - but if its too much money the phone won't ring and people on the zone will just laugh at you.
