MacSwap.com.....Scam???

Hi everyone. Been looking for a website with no fees to sell my year old TimeCapsule 500gb. I posted it on MacSwap.com, but when I viewed my post, it told me that someone with a different screenname had posted it, complete with a different email. Thinking we maybe had a similar title, I reposted with a very specific title/description, and found that it had happened again!! I looked and saw that instead of my email, another gmail address was listed. I emailed it and got no reply, but I am concerned about the site. Scam, or simple tech mistake?