Shipping is posted on my Ebay site so folks know BEFORE bidding.
The only reason I can see for anyone to use a reserve is if they think they can get a bidder emotionally invested in their auction, and bid more than they intend. Reserve auctions are an insult to buyers. If there is a reserve auction I am interested in I will email the seller and ask them what the reserve is, if they won't tell me I won't bid, why waste my time? Most WILL tell you. It is especially dumb to sell used cars with a reserve. I wouldn't bid on a car, or any other used big ticket item unless I can send someone out to look. I am not going to invest the inspection money on a rediculously overpriced vehicle.
I typically start my auctions at the minimum I am willing to sell, with a buy-it-now price at about the maximum I feel it is worth.