Test driving 4x4s - scuttle shake

The larger the wheel diameter, the more it will show up any looseness in components. and People that own 4x4s often (usually IME) cannot afford to maintain them as they should and will compromise on servicing and especially on tyres.

A friend had a Disco diesel auto from new and had everything done as per the book without compromise, 1,000 a year was the typical price he paid over the 8 year period he owned it, and he only travelled about 6 -8 k per year, never towed with it, rarely even had a passenger, so it was well treated, and garaged every night, he got rid of it in 2003. Most people will not pay out that sort of cash (which would be probably 25 percent (or higher) more today.)

If it's been used off road have a look for globs of mud on the inside wheel rims.

AJH