Definitely not hard to figure out, as TFA pointed out above.
In fairness to the OP, the seller/trader/whatever didn't have a net negative feedback (it's like 75% positive) and all the negative comments are about him flaking on buying a gun after agreeing to it or not responding... which frankly, is SOP for a lot of people on the classifieds. Nothing to indicate false advertising in his items or other duplicity like that.
Having sold off a chunk of my collection and helped my (now ex) girlfriend sell off her deceased father's firearms collection, there is inordinate amount of tire kicking and false commitments (granted, not as bad as on Armslist) on INGO. Personally, I don't mark anything sold until I have cash in hand.
The negative goes to character. If you commit and back off that shows who you are. A simple explanation is due at the point you change your mind.
I have experienced tire kickers.
Twists me up when you see your ad bumped with "PM" sent and all they want to do is ask questions that are answered in the post.
The "PM" sent does set some folks back thinking a deal is in the works.
Just send the darn PM and do not bump the thread with the big announcement.