dragon shield card sleeve Matte Clear 100 Deck Protective Sleeves in Box, Standard Size for Magic he Gathering (66x91mm) : Toys & Games VanguardMatte Sleeves Dragon Shield 100 Count Sleeves

While you might already have these, if you need more there is always the option to go back and get them

Loxi: From a Commander perspective, this is a good repeatable discard outlet for decks that want that

There are lots of collectible magazines and online stores that list current prices

Unlike Flairs, trading doesnt require extra copies

For reference, I played on the military airbase in Misawa, Japan, my play group consisted of four potential (and two actual) Pro-tour competitors with DCI ratings well above 1800 as well as several dedicated brewers who came with interesting concepts (though often unsuccessful) every week