To be fair almost all Defenders have an issue of some sort, I bought my 2005 double cab last October for 15k, 98 thousand miles on it in good shape, spent another 10k going through it to take to Morocco which it performed faultlessly, now I am going to have a galvanised chassis and 4 galvanised doors fitted and all new bushes as they got a battering.
My current chassis is immaculate with exception of some flake right at the tips of the rear cross member inside, so before it get worse I'll get it swapped, my doors are starting to go at the bottom channel sections, so instead of trying to fight the rust new galvanised doors seem the way to go, but I will be in to this 110 for £29k, and I know it will need other things in the future, as that's the nature of Land Rover products, oh yeah, I'm having a recon 1.2 transfer box fitted in two weeks, there goes another £500 to add, shhhhhhhh, if my wife asks, Defenders are really reliable and trouble free!
Irony is, I hardly use it, maybe once a week, except for going to Morocco in April.
Buy a cheap one, buy an expensive one, either way they constantly beg for cash like a teenager. No such thing as a cheap Defender any more lol.