Someone was talking about one at Harbor Freight.
Best thing I bought at Harbor Freight was a CenTech Digital Inspection camera. It is really used for inspection car engines, looking down plumbing pipes, or behind walls. A longarm quilt guild friend showed us how to it to look under the quilt frame to check how the stitches look on the back of the quilt so you can get the tension correct. No more crawling under the frame with a flash light to do this !! Just put the little camera deal under the quilt on the frame and look at the screen to tell if your stitches are good. Got mine on sale, plus a 20% off coupon.
maybe this would work for you?