Just a little something I've found. Comes in handy on blizzlike servers!
Sorry if this is a repost, but I did my best to check.
Basically, when you go to a vendor who repairs, use the single-repair instead of the repair-all. Repair your items individually and it won't cost you anything!
This still works on the latest Ascent rev.
[Tested 19th May.]
Hopefully it'll come in handy if you play a blizzlike server. Did for me.
Enjoy.