When an ad is the first and only post by a member some suspicion is warranted. But it should be noted that even though the post count is 1, the records show
his or her join Date was 10-02-2015. I rather doubt that someone would join the forum and then wait over four years to run a scam
This is but one of the due diligence checks you should do when looking at ads online. Whether it is checking a feedback rating on eBay, looking at the history of forum participation or any one of other ways to vet a seller, caveat emptor.
On the flip side, a seller would be well served by establishing a record of forum participation.. reading past posts can tell you a lot about someone. And posting more than one photo might help also.
We now return you to the business of buying and selling. I'm betting someone is going to get a nice camper.