Profile > Edit Profile
In the list of items that can be changed with Yes/No, select No for:
Receive alerts when items on your Wantlist or For Sale / Trade match other members' lists?
-- Dan --
Note: Please see my profile for more info regarding trading (section updated 10/25/2023). I have added a large portion of my inventory to the site, and currently have trading turned off (details are in my profile). I have (finally) unearthed my 2 very large boxes of Star Company minor league sets and they are available (email for details).