I just got contacted by the same number same thing about PayPal for my motorcycle I have listed for sale! Smells like a scam.

Good guess!

Yes, you were exposed to one of the scams described here:
http://phonehelp.2truth.com/facts_rev.html

Remember to return here, to 800notes.com, after you look at any of the information at that site, either to post more information, or to let us know avoided the scam.

You're right to be leery.  This info from Craigslist will help you understand why it's always better to deal with local, cash-in-hand buyers.

http://www.craigslist.org/about/scams

Edit: This info is good not only for Craigslist, but also other online "marketplaces".

This guy says he is in Texas and wants to buy my 4 wheeler using paypal and have a shipping company pick it up. I told him cash only and he is very persistent on paypal. I smell fraud that's why I'm posting this be careful I think what happens is he transfers the money to the pay pal acc but you can't withdraw the money till the shipping company is paid and the ask you to send him a cashiers check to pay for the shipping. Once you do that he cancels that pay pal and your out the shipping cost.