I recommend you use the following:
Snapz Pro X - Pretty good quality, but it only lasts sometime if you use the preview...I don't know how long though

. I think it costs more than $70.00
Screenium - Good quality as well. If you use the preview, you can only record up to 30 seconds of footage. If you buy it, it lasts longer, and is only $20.00 I think
They both probably cost less than $100.00