Well, there're 2 e32 at below RM20K, even market rate is at Rm25K (like you said) in the star last week, but now only one if you go to
www.thestar.com.my classified: BMW 730I(A), 87/89. tip-top cond. , a/c, sunroof, electric seat, CD player, nice no. RM12900. 18/4/2006, another one was advertised at RM11K, which i did test but didn't buy. Yeah, it's relative to condition etc, but the fact that some are selling at that prices, means market is really going down... mainly due to new models are realeased in short time these days...
Also people are buying newer model cars nowadays, and say, if you compare people are buying a new Isware at say around RM30K, versus 1988 e34 12V for below RM30K. Unfortunately, 2nd hand cars like Kancil, Saga, etc have their own market segment and there are buyers willing to pay, don't think it will go down to few hundreds (like in Mat Salleh countries).... unlike THE BEH EMH DABLIU... give me opportunity but have to wait for the right time... after all rich guys used them up... look at Peugoet 405 price today, quite cheap... or some 1993ish Volvo 940 GL, which is quite a good 4 potter 2.3L...
For E38.... it's has always been my dream car... For those eyeing on 740i, why not convert to 100% NGV... you'll get 1/2 priced roadtax... but get ready to tow if ran out of gas... or No NGV if outside KL..., or after certified, put back the petrol for stand by..... errrrr NGV is only 0.68 per liter...
But 728i is fine, as i hear some 750i'ers don't go faster, because most of them are law abiding citizens...