eBay with Worx has the 6-Pack WA0010 Worx Replacement Spools for all Battery Powered Worx GT's for $8.61 with free shipping. List price: $20.
Has excellent Amazon Reviews.
Amazon has the Honeywell Lyric T5 Wi-Fi Smart Programmable Touchscreen Thermostat for $99 with free shipping. Home Depot sells it for the same price.
Has good Amazon Reviews.