I wanted this to show up in the Member's list so I added this to the memberlist_resultbit template. I haven't done this long so if there is a better way please let me know.
Code:
<if condition="$userinfo[field12] != ''"><a href="member.php?&do=memberauctions&userid=$userinfo[userid]"><img src="images/misc/ebay.gif" border="0" title="$userinfo[field12]" align="center"/></a></if>