Long-distance purchases are always a gamble regardless of what precautionary steps one takes but if you are wedded to an E34, which is a nice boat, there are lots for sale nationally. Despite some of the paranoia voiced over your other post regarding cored hulls, the is nothing wrong with a cored hull which has been properly maintained. Obviously, lots of people are prone to simply repeating common misconceptions. Comparing a long-distance boat vs. one you can see and touch (and inspect), the cored hull one is less of a gamble.
If it were me purchasing a boat elsewhere, I wouldn't even seriously consider having it surveyed until I first looked at it myself. Seen too many bad surveys and surveyors which can be a legitimite paranoia.