I have bought and sold on Reverb. The seller rates the condition of the gear. Reverb publishes descriptions of each condition, but, as far as I know, does not review posts to ensure they conform to those descriptions. They are certainly subjective ratings that are easily abused by unscrupulous sellers, and the crack in the bass in the OP's post is far from "very good" in my opinion.
I have experienced both sides of the coin when buying from Reverb. I purchased a pedal described as mint by a music store using Reverb that had glue residue on the back, a chip in the finish, and was covered in dust -- not what I would consider mint. Then I bought used acoustic guitar that the seller described as excellent, but was in absolutely mint, like-new condition. I had to hold it a eye level at an angle to the light to even find the scratch that the seller described in the posting.
As Unicorn Bass said, used gear posting must be taken with a grain of salt.