Phil,
1. Ask for the dimensions and weight on the box.
2. Get his address
3. Go to http://www.fedex.com/ratefinder/home?cc=US&language=en
And do your own quote.
Ebay just changed their policy too. Sellers can no longer leave negative feedback for buyers if you decide to bail, but you will get a non-paying bidder strike.
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I made this up but used the above site using Fedex Ground Home Delivery insured for $100.00
From: Hialeah, FL 33010, U.S.A. | To: Waxahachie, TX 75165, U.S.A.
25 LBS - 70x18x18
It was $127.22