The Ricoh Theta V (reviewed here) is one of the most convenient 360 cameras to use, with a slim form factor, in-camera stitching for photos, and an in-camera stitching option for videos (although you’ll need to process the video in order to add stabilization). Regularly the Theta V is $375, but you can get a refurbished one for as low as $239 from Focus Camera, or a certified refurbished one from Ricoh for $301.
Is this a clearance sale? Is Ricoh about to release a new camera? I think it’s too early to say that, particularly since a new Theta V is still around $375.