BGN-graded stuff is more likely to have defects. The missing eyecup would make the item qualify for "BGN". The meter deficiency should have probably been caught, but things happen.
Well there were enough scuffes and scratches on the finder to qualify for "BGN" already - even with an eyecup. KEH does sell Prism Finders missing the eyecup - but they typically note that explicitly (in fact there are current examples of this on their site as I type this).
Any "BGN" Bronica SQ-AI with a ME Prism Finder S has probably been a wedding photo work horse - I knew this before the purchase. It may not have had the sheer number of rolls put through it as an outfit in a studio (one with a WLF), but it's probably been knocked about a bit.
I think the underlying problem is two-fold:
a) A BGN grade MF outfit was likely professionally used. It, therefore, requires a bit more inspection. MF outfits typically involve a coupling of different parts; the parts cannot be tested in isolation and - unless the inspector is very familiar with the outfit - the outfit can be time-consuming to set up for functional testing.
b) A BGN outfit is sold for less money (the margins are less than on better-condition equipment). There is, therefore, less incentive to invest the time to inspect it.
Anyhow, KEH said they will take it back and try to see if the problem can be addressed. If not, I can elect for a return for a full refund.
This sort of flexibility is why I continue to put up with KEH.