PayPal Question

[rawfuls]

Hey guys,

I've recently sold a few things on eBay (External Hard Drive and an iPod), anyways.

The guy (same guy; which kind of worries me), who has 6 previous deals, has bought both things.
One costing $70 + ship, and the other $61 shipped.

He paid me with an "eCheck", which again, worries me.
I've never dealt with eChecks before in the past, so I'm not sure.
I know I have to wait until it clears (the check) before I ship it.
However, I was wondering if it can still "bounce".
Or would it "bounce" at the "Pending" stage?

I don't want to get a "eCheck went through" email, then a few days later get those funds retracted from my account because something bad was found, losing me both things, AND the money..