Thumb Score: +57 Direct Tools Outlet has RYOBI ONE+ 18 Volt Glue Gun (Bare Tool, Factory Blemished) on sale for $14.99. Shipping is Flat-rate $7. Thanks jerritp Deal Editor's Notes & Price Research: This Hot Glue Gun is compatible with any RYOBI 18-Volt battery and has over 3.5 hours of runtime.