Just solmething worth noting.

If you have both Auctionator and Auction Master installed - the two of them interfer with each other.

For Auctionator - the Sell Tab gains extra data and none of the buttons work

The Sell Tab that Auction Master creates is completely empty.

Reported by http://www.curse.com/users/RideaStar on 7/4/2015
http://www.curse.com/addons/wow/auctionator?comment=5570

Unable to reproduce with AuctionMaster installed, seeing distinct tabs for each addon - auctionator shows in orange in the screencap, auctionmaster is the last two tabs. (Auctionator version 3.2.4, AuctionMaster version 6.0.4)