If you want the Preds unopened and MIB, you are going to pay more for them. Having said that, if someone offers one and they say it is MIB, check their feedback. I can tell you that I have purchased several items from other freaks, and none of them have made any claims about the item that were not true. I think that it is safe to say that the folks on this forum are not out to screw anyone because they are collectors too. I can also say that the Mods have laid out several rules that are designed to prevent any misrepresentations in the commerce threads. If they saw something that was not in line with the rules, they would act swiftly and take the appropriate actions. The Mods started the Feedback section for just this reason. Check them out and you will see those that have bad feedback have it written out in red letters by their name.
I have a Scar Pred that I am trying to sale in the FS threads. It was on display and I took it apart and returned it to its box. It was not that hard to take it apart. I feel very comfortable saying that it is in Near Mint condtion. There are times that the unassembled Preds are just as good as MIB, and you can often get them at a cheaper price.
Bottom line is that everyone I have dealt with on this forum has been totally honest.
It is hard to be completely sure that a HT Pred is MIB, but you have to take someone at their word.