I personally believe written condition descriptions, such as that by the NRA, to be a lot more important before the ability to include multiple decent-quality pics in an ad, or an email. An accurate written description of the condition is still important in disclosing things that aren't easily visible in pics, such as reliability, accuracy, "tightness", replacement parts, maintenance or repairs, etc., but I'll take quality pics over a seller's interpretation of the NRA's rating every single time.
As a seller, I always post as many good quality pics that I can, of the parts or angles I would look at when physically examining a particular gun. I also state in ads that prospective buyers can contact me for additional info., pics, etc., which I have provided offline on a number of occasions.
If you're unsure of the exact grading, you can always provide the pics and state "please refer to pics, and feel free to ask questions."
Good luck!