I too have followed stuff---Like this:
I found a 71B at auction, so I looked in the seller's feedback, and found the auction in which he had bought the unit, then I went into the previos seller's feedback, and found the auction when He bought it....
Interestingly, by the time the trail dropped, tyhree back, The 71b had been purchased for 250 bucks. That buyer sold it for about 130 (so lost some money, seems to me) and then that guy's action went for around 80 bucks----and so two epople in the cahin lost money----
But this was an unusual case, where I think there were actually fully ligitamate people buying and selling (at unwise prices) as I could see both buy and sell transactions in their records.
Most of the "power sellers" show NO buying activity, and most buyers show NO selling.
Further, I think there is a lot of shilling going on--because it is so EASY to do it!
Look at the bidders--almost all the time, you find a bunch of 1, 2, or 3 transaction bidders---now some of these are ligit----just new and inexperienced (I only have 10 feedbacks myself!). But others are surely shills.
Follow the experienced and successful buyers, and you will discover that tehy manage to buy stuff for WAY below the median price----calckidd is an excellent example. I have gone inot a number of acutions where "he" shows up, and he never stays in the running ifit goes anywhere near median price. If you check his records, you dicover that he gets stuff for way cheap---a 7Bfor like $50, a 48GX for like $25 or $35, etc.
So the savvy auction buyer make s a careful study of not only the product, but also the legitimacey of the auction.
Best regards,
Bill