A long-time KEH customer, I have been doing business with them since 1981, when I was in school in Atlanta. As far as grading goes, I have found KEH to error, if you will, on the stingy side. To wit: in the past six months, I have purchased a Nikon F2A, a black Hasselblad 500 C/M and several A12 backs , all listed as bargain. Despite the fact that only the Nikon had any visible markings (the usual rubbing marks around the strap lugs), all items were listed as bargain grade. To date, all have performed without incident.
In the past, I have purchased items such as tripods, Halliburton camera cases, and miscellaneous items such as cable releases and extension tubes. Again, bargain grade, and again no issues.
That said, I am decidedly more partciular when it comes to glass: EX is my cut-off; I will not take the chance on buying a lower grade.
In sum: for anything but lenses, if my 30 years' experience with the folks at KEH is any indication, you are not taking any great risk in buying Bargain grade items.:munch: