I suggest you should flip your internal personal question and start asking "Would this thread possibly be insluting to someone that had 3-30k stolen form them?" if you really care for the people of this community.
There are all sorts of questions that we each may be curious to know, but some are likely hurtful and insulting to many of the people here.
I already answered your question on Pred prototype > 4800 is what it originally sold for (that is what I was told and actually think it may have been inflated if anything). That is an incomplete game and missing a handful of things. It is also the crappier player of the prototype that were made. I do not see the value changing much and if anything you have seen many people explisitily say they would want nothing to do with it. Reality is that it will not sell for much more than it already has. Some rich guy may pay a high dollwr as show piece but most of those guys like the story and that game in partciular has a pretty crappy story.
As for the MG proto #4 that was sent to the northwest and then back, it was not a finished game and more cobbled together crap than anything. It appeared to have really bad geometry and did not shoot well. No matter the story, a non-playing game is pretty worthless to most collectors.