Just received an email from Best Buy containing a coupon for $10 off "select Mario games." Haven't seen a list of eligible titles, but I can confirm that it works for Super Mario 3D World + Bowser's Fury. Super Mario Party, Odyssey, NSMBU DX, and MK8D are also pictured and probably safe bets.
Subject line is "Celebrate Mario's 35th anniversary with savings on select games." Expires 3/6/2021
Hope that helps somebody. Happy hunting!
EDIT: Well, shoot. Just saw this on the CAG Twitter feed. Hopefully the extra visibility and info regarding Mario 3D World make this not a total waste of a post.