Amazon has the SanDisk 256GB High Endurance C10 U3 V30 MicroSDXC Card with Adapter for Dash Cam and Home Monitoring Systems (SDSQQNR-256G-GN6IA) for $37 with free shipping on $25+ or with Prime. Same price at Newegg.
Today only. Amazon is taking up to 49% off Lexar memory cards and internal solid state drives with the discount shown on the product page. Shipping is free for Amazon Prime members or on purchases $25+.