Ends 7/14. Lowe's has the 125-Piece Dremel Steel Set Multipurpose Accessory Kit (125AO) for $13 with free store pickup or $6 shipping.
$13 retail: $20Report
Amazon has the Dremel Drywall Jab Saw Oscillating Tool Accessory (MM435) for $3.99 with free shipping on $25+ or with Prime. Compatible with most oscillating tool brands.