I remember the reason for changing the maximum size of the avatar from 100x100 to 64x64 was because some people abused their avatar to scam other people

as we know no trusted trader would ever abuse their avatar to scam other people, why not allow them to use full-size avatars?

Read how to post a suggestion: http://forums.d2jsp.org/topic.php?t=57896631&f=258

You need a poll
I don't see this happening as just cause someone is a known trader doesnt mean he wont scam

Also read this http://forums.d2jsp.org/info.php?p=4