Nice gent eh... cheers mate...
Erm, well mine is no less economical than a 325i in normal driving, has much better steering due to the number of turns and surprisingly good feel to it (M5 has slightly higher gearing). It has LSD, uprated springs, bilstein dampers and thicker anti roll bars than the normal 535i too. Mine has the dog leg close ratio gear box (overdrive box better for cruising) but its always on the power so ideal for fun car like mine..
I much prefer it to my old sport (sorry guys) much more grown up, quicker and the soundtrack is much better
Fairly rare too as around 1400 manuals and 712 autos made it to the UK, but the normal 535is seem to be even rarer ( for sale anyway) hence why some do not even know they exist... I can't imagine there are all that many left and it is quite possible mine is the last Agate green one, but that is yet to be confirmed.
They still seem to change hands for very little money, only very best examples being anywhere near 3k and compared to the rediculous price of a hanging 325i sport they are quite a bargain... As has been said most of them are only good for landfill these days though so check very carefully for the dreaded rot especially in the front floorplan, sills,doors and the rear subframe mount area...
Mine is also running an Eibach pro kit, braided hoses, Powerflow exhaust (not shown in the pic) 7 series front brakes and has been re-bushed throughout. I have a 6 branch and M5 E34 rear brakes to go on in the garage a UUC shift kit on its way from the states and I will buy upgraded ARBs and adjustable top mounts in the next month too.

Mark.