As you thought Lolly - LOADS & LOADS of sucking of teeth and "old man sayings" such as - "you don't want to do that!"
I am not sure what these guys are trying to prove?
After all Lolly - both the GLASS guys arrived in Land Rovers! - one a 1958 Series I and the other a TDi Discovery of many many miles on the clock!
Volvos catch fire and it is an irrelevance because 3 or 4 incidents are not statistically significant! Tell that to the families involved!!
But OF COURSE Land Rovers are unreliable! Despite being voted the most popular car of all time on the Top Gear pol.
Only thing I would say is that there is a lot "more" to a Discovery (two gearboxes, Dif Lock, Two prop shafts, two axles and four drive shafts) so a lot more to go wrong.
Some have been seriously off-roaded and therefore totally knackered. Others have been owned by Farmers, never serviced and left standing in cr*p for ages.
So get an HPI check, get a full service history, and if it looks to good to be true it probably is!
Finally find out the reason for it being for sale. Most of us that find a good one tend to keep them as Land Rovers are one of the few vehicles that can actually appreciate in value as long as it is kept in good condition.
They are cheap and easy to maintain and will totally stun you with its abilities.
There will always be the numptys that say "you don't wanna do that".
But get a good one and you will never look back!