First, thanks for your hard work here. Vendor is one of the best addons I've ever seen, both in design and functionality.
Maybe its a bit out of scope for what you do, but I think it would be very powerful to have another tab called "mail" in which we could create rules not just to vendor or destroy, but also mail. Your rule system is very powerful and would help a lot with mailing things to the enchanter, or transmog itens to my seller, etc.

Again, thank :)

This is a good idea, basically a new rule type "mail" (we had scrap briefly in BofA) and button on the mailbox that lets you send them, that' s a godo feature for 6.4