So, I ordered an item about a month ago, it's supposed being sent first class, and the ordered was meant to have been dispatched 2 days after I placed the order.

The selled is adamant that he has sent it, and so it's his word against mine really, it's not a recorded delivery I either so there's no way of tracking it, has anyone dealt with this sort of thing before?
Funny words.
if all else fails, open a dispute. you'll almost certainly get your money back if you paid with paypal.
my name is matt. you can call me that if you like.