E21 Cheaper? maybe parts is one of the factor and oso the maintenance on which ended up with parts oso, BUT if you can get someone who willing to sell his E21 Tip Top condition...it aint cheap anymore.
E21 enthiusiast has their own community i guess, in malatbimmer not much only to -berg- and eurouge..if you looking for 2002ti..look for saint, you can check
bmwe21.invisioni.com/ Its a E21 Community for Malaysia and Singapore!
For your E30, again if Engine KO is not a problem, the main concern is the Chasis condition. If karat like no other business susah jugak if want to do bodywork.
Last time, i went with tombstone and pravindastar see some E30 for sale... the rust is tremendous and open up for sale for 6500k - 7k bith are running condition. Again, after checking the cost of all the trimmings like doorcuts, steering and also dashboard...fuhh...in gonna be easily reach-up additional 5k (including new paint and such).
So for those members out there, just give a hand to steven to find his dream car.
Cheers!