I was the mod who approved the ridiculously cheap 5DII offer.
I looked at it blinked twice, ran the rules through my head and approved it.
From time to time the mods discuss these situations amongst ourselves and we decided that it was not a rule violation. I think I quipped something like "perhaps we ought to buy a dozen of them". We try to moderate this place carefully but firmly but considering its size, the task could grow to become unacceptable to our squad of volunteers if we made the rules too complex. I feel that it it better to hold the line firmly on a simple set of rules than to give up on a complex set that nobody understands and consequently would be administered unevenly. In the B&S forum, the real dynamic is the same as in any other financial transaction. If a willing buyer and seller agree on terms the deal is done. The mods cannot get into either parties head and anticipate what factors are significant.
So please let's keep it simple.
-bob