While I personally like the CED 7000 timers best for personal practice, the Pocket Pro series is perfectly good---and right now (Black Friday and weekend, far as I know), the BenStoegerProShop is currently having a $30 off sale on those---that's about 25% off normal price.
http://benstoegerproshop.com/brands/Competition-Electronics.htmlI have used both the Pocket Pro and the Pocket Pro II---both work perfectly well.
So if you don't have a timer, and you really want to get better at shooting skills, now is a good time to pick one up!
