Do you initiate contact with the seller or does he keep you informed? The flow of communication is important. Since he's a new seller, he could be a little slow and you'll have to give him a chance. Also, if he sent media (though $10 for media would have to be extremely heavy!) or parcel it could take weeks since third class is slower this time of year.
It's also the holidays, so personal and family issues do arise and if you get it, you can leave your thoughts in your positive or neutral feedback. On the other hand, since it is the holiday season, scammers also rear their heads so since you paid with CC Paypal, you can always raise a dispute via Paypal. If Paypal drags their feet you can also file for a reversal of charge with your CC.