Beware. I've read where some people have gotten hoods that have been loaded with flaws, even though they were claimed to be "Grade A" also. I'd think (and my expereince shows) that your best chance would be to stick with a name brand part. Iow, one company's "Grade A" is not necessarily another's.
If you can, check it out before you commit to buying it. ViS makes very high quality parts (i've got one!), so the hood should be good as long as it was taken care of and not abused by the previous owner.