Honestly, their EX to me is hard to distinguish from LN-. Honestly. I have bought two lenses from them, and a viewfinder and they are generous.
At least with Bronica.
That said, if you got the boxes and all and it was more of a demo model, and that is what you want, then you did fine.
And as for your lenses, KEH is great.
Personally, and this is me, I like KEH because I can count on quality as opposed to EBay where it varies widely (still waiting for one delivery...*sigh*...). That said, i got an ETRsi body for $300.00 new in the box from EBay.