1. It probably means they have the sales receipt. Doesn't mean much to me and I've never asked for it. Sometimes the seller offers.

2. Several Major distros well known here such as FUN, Cointaker, Tilt Amusements, GEX etc. This would be full retail but backed by known quality support after the sale.

3. Shipping will usually be $250-300 from a distro. Closer to $400 if from a private seller residence to residence.

4. Be careful with the money. Avoid Paypal and do not send even $1 as "friends and family".

Congratulations on your upcoming purchase. I still remember unboxing my first pin, a Stern 2010 Spiderman. These answers are my opinion only. I have bought and sold quite a few games over the last 10 years, so it comes with a little experience. Also, I have a DP Pro and its a great game. Pros are easier on resale when your ready and there tends to be less loss of money. HUO pro is a good option IMO.