I've got the MITSUBISHI LANCER EVO 7 which I picked up for just under £10.
As everyone says nice model but it has to be my most frustrating car. Sould be 4WD but with in a week of getting it it was making a clicking noise, the rear pinion had split so a quick pinion change and now it's RWD.
Grip was ok when I was running it on Ninco track with no magnet but now I am running it on a smooth plastic track no grip at all, when I was testing my layout with quite a steep climb it would end up sliding back down.
Don't know if it's because the guide is to shallow or if it's to do with the spring or the self centring but anything more than a gental elevation change and it will deslot. It could also be to do with the way the motor is mounted in the chassis, The motor is recessed into the chassis and then there is a slotted cover below the motor so very little clearance.
I've now fitted it with the front tyres from a Power Slot VW Polo which are slightly larger diameter and have much more grip. The extra little bit of clearance has helped the deslotting abit also put the magnet back and added weight to the very front of the body as low as possible.
Things still to try are slightly larger front tyres, could make deslotting better or worse. If I keep it as RWD make the front axle floating and make guide fixed not floating so the car rests more on the guide. Remove most or all of the cover under the motor, got to be carefull here as if I remove it all and the car grounds out it could short the track as the motor is flush with the bottom of the chassis.
In conclusion I would say - Good looking body, poor running gear, need tyre change, if you get one with the older shallow guide only good for flat tracks but definately not my slowest car.