I rarely check my email tied to my ebay account so checking that daily whether I've sold something is not ideal.
You can change the email address or set it up to text you, just go into Account -> Communication Preferences -> Delivery Options and then also the Seller area.
I have these too (wearing them now) and judging by the photo, bought from this guy. Mine were brand new in box and they are awesome.
I had a guy send me back a jacket because he said it did not fit, and he was going to throw it away otherwise. He returned it to me, and never wanted a refund of item or shipping...
Resold it for 70$ the second time, and 50$ the first time...
I was wondering about this the other day. What's to stop you from underestimating the weight of everything (aside from a conscience, of course)? I remember before I got a precise scale I did exactly that, and nothing happened. Based on my imprecise scale, the package was somewhere between 3 and 4 lbs. The difference of 1lb was like $17 international. I chose 3 and printed the postage, sent it off, and buyer got his package just fine. If you're close do they just let it slide or something?