Howya Baitchef – without naming any names, there has been plenty of hassle with smashed stuff, lost stuff and stuff that has just not arrived and that is off these TF buys and sells boards.
If i was going to do a private buy, i would, as you say, make sure that it is insured, or arrange to meet the sellar.
Courriers can be a nightmare and i wish i had a tenner for every bad story that i have listened to.
Packaging the sections correctly is half the battle i reckon. The last lot i sent cost twice as much as normall just because of the weight aspect, but they got there ok.
And no, i dont think you are paraniod on this one.