Here are two with shake awake both under $150. The Swamp fox is dot only, the Holosun is 2 moa dot and 65 moa circle.Dot. Shake-awake would be nice.
Liberator II - Red Dot Sight
The second generation Liberator incorporates some handy new features. Shake N Wake motion sensing auto on/off, super-efficient crisp 2 MOA dot emitter; and a greatly improved battery life all combine to provide a significant performance upgrade over gen 1. It sports 2 night vision and 8 daylight...
www.swampfoxoptics.com
Amazon product ASIN B01BJ3ZXD0