I may have been scammed on Ebay - Advice?

[scott8]

So last week I bought a Treo650 for 500$ on Ebay.
I then got an email from another Ebay member who saw that I purchased the phone who said they also purchased a phone from the same guy and had not received it and thought they were being scammed.
I then emailed the guy about the phone.
He said that he was having a problem with his "supplier" and would have the phone out shortly.
Ebay doesn't let you file a dispute with them until it has been something like 15 days after you purchased.
Finally, I researched more about the guy on the site and he does have something up about "Thank you Ebay for giving me a second chance".
I'm not feeling real good about any of this right now.
Anything I can or should be doing while I wait for days to pass to qualify for the dispute filing on Ebay?
-SC