Many scams on the loose, sometimes it is hard to determine which is real or not.
Couple of scams come to mind:
1. Collecting information electronically so you can view.
2. Asking for money prior to move in or agreement
3. Having a local agent show the property BUT the poster asks you NOT to mention his name.
Most posters like to attract people with their low ball pricing, which will generate the lead for them to scam.
Just remember, "If it's too good to be true, it probably is"