add the slightest drip of moisture and the 7 is f**ked
this is when the evo is at its best 
It's 2.5 times the weight for ffs. Having said that the VX AWD 7 will set you back £45k and there isn't a single second hand for sale in the world right now. 
my mates evo is near 1100kg an is just in the middle of addin a bigger turbo to have near 750bhp,thats not 2.5 times the weight on my calculator 
Gross vehicle weight 1850kg
Source (your link
)
http://www.autotrader.co.uk/classified/advert/201236484420737/sort/default/usedcars/onesearchad/used/onesearchad/nearlynew/onesearchad/new/page/1/radius/1500/keywords/fq400/postcode/g134rf?logcode=p
The lightest Evo of the reg you selected is the MR FQ300 is 1400 kg's....your mate must have got rid of the engine to lose that much weight. Running on uranium maybe? 
started life as a 5rs then with 4kg doors,bonnet an tail gate an the interior stripped its just over 1100kg 
Well he's done very well to take a 1,570kg car. Down to 1,100. He must have had six dead bodies in the boot, to shift half of tonne 
just stole this info from here
http://www.spanpodyv.pwp.blueyonder.co.uk/gsr_v_rs.htm The RS model weighs in at 1260kg instead of the 1360kg for the GSR, although weight could be reduced
further on the RS model by opting for the thinner gauge body, or by asking for a car minus the aerodynamic
appendages. RS packages were basically the same, although the optional wheel and tyre combinations were
naturally bigger, in line with the standard GSR fitment, and a crossmember support bar was added each time
the larger wheels and tyres were specified