Here's the description as of the time that he wrote back:

"You are bidding on a game-used Maple Sam baseball bat from 2002 that measures 34-1/2". Blocked letter model #CAN 1. Bat shows heavy use with pine tar, grip tape and a large crack in the handle. Uniform #15 is on the knob. Walker played for the Colorado Rockies and Montreal Expos among others. Shipping 15.00 to continental U.S. We now accept major credit cards and Paypal! Check my feedback."

Yes, he doesn't say Walker's number was 15, but he also doesn't mention that the bat was never used by Walker, which is a bit deceptive to potential bidders.