You do not have to spend $125 on a sight. Get a bare bones aluminum sight with good adjustments and be done with it. I use a $30 Cobra that I added an extra pin to. $100 should get you a good sight, rest and most of a release. Or arrows and broadheads.
But I will tell you to get rid of the plastic sight. The one that came on my bow was a POS. When I tightened the sight pins, they would dig into the plastic, thus making it hard to adjust properly. I robbed the pins off of it and threw it in the trash.