After spending far too much time with the supervisor, I was able to buy a PNY 6800GT for $300. Of course, they don;t have them. In fact, there isn't a Best Buy any where near there who actually has them. As mentioned earlier, these aren't available on-line either.
They have a sku and the inventory system says they exist, so I bought it (some order-it-from-inventory type thing - sound pretty tricky, but that's just me). I'll give it a few weeks before "returning" it or fighting for an equivalent substitute (they DO sell that BFG model...). I don't have high hopes, but it's worth carrying a bit on the CC to let this play out.
As a side note, I was able to get $10 for each $100 spent. I'm not sure if this is sotre-wide, or a "gift" for my "pain and suffering". YMMV.
EH