jojo.. the M635CSI/M6 is already answered in your other thread.
As for market value, it can go as low as RM15k and as high as RM80k! It's a case of willing seller, willing buyer. That's usually the case with classic cult cars. I got mine for a little over RM20k.
There's one in Ampang going for RM50k. (to those who've seen this particular one, Yes, it's still not sold!)