Have surfed site for few weeks. Decided to upgrade the Lada (heard most of the jokes!

Have decided 93-95 2.7TD auto Terrano is the go. Looking for one for under $4k on TradeMe (fair price?)
What should I look for in test drive... Intend to add aftermarket auto cooler after much advice onsite suggests this, but how do I know the condition of auto at purchase time? Any other good/bad signs to look for?
Considered 93-95 Surf but seems to be little benefit in 2x the price for similar stats?
Any advice, guidance would be appreciated...
PS any one want a Lada (1990, 56km, 2 owners, loved from new!)

Thanks Blair