I love promos.  I'm also looking for any recent league tokens (from BNG forward).

I have the following playmats for trade.  Note that some of them have the Star City Games logo but the images I found online don't always include the logo.

Battle for Zendikarrot (http://orig09.deviantart.net/25fc/f/2015/244/a/8/a8c5a1f477433a1b8bc71c4b8d5f4b6f-d981gk4.jpg )
World Magic Cup 2016 playmat, with Dramatic Entrance art (http://media.wizards.com/2016/images/daily/Awvs1jarXl.png)
Bengali Rai (https://www.deviantart.com/alradeck/art/Bengali-Rai-Prerelease-Mat-624757025 )
Force of Will playmat with the judge foil art (https://dacardworld2.imgix.net/force_will_staff_mat.jpg?auto=format%2Ccompress&fill=solid&fill-color=fff&fit=fill&fm=jpg&h=340&ixlib=php-1.2.1&trim=color&trimcolor=fff&w=340&s=a1103eddc6fca95c9a0d6c362646c952 )

I typically use tcgplayer market prices as values.  Deckbox prices are often way off.