Amazon with Upper Echelon Products has the Repel Windproof Auto Open / Close Lightweight Compact Umbrella (Black) for $24  - $9 off with coupon code P999DIDK at checkout = $15 with free shipping on $35+ or with Prime. 

The 2-pack is $29 w/ coupon P3OSINIX, 3-pack for $42 w/ coupon C7U8FYT4, and the 4-pack is $54 with PVPBI4UR coupon code.