I'm a hobby level guy. Mostly BIN but do occasionally do auctions for rare/highly sought after items. Hard to find (HTF) Pyrex is extremely hot right now and can do very, very well at auction. I do not always accept returns especially if I feel like I'm being scammed. I have taken on a few disputes and have managed to maintain a top seller rating.
I do not typically ship out of the US without going through Global Shipping
With that said, I think the OPs selling guidelines are spot on