Looking for motorized bicylce

I need a motorized bike to get to work and back home, but I need one that doesn't require a license and is around $100-$300 maybe little more. I do have hills on the way to work and back. I don't have a bike nor a kit so was hoping someone could give me an idea or point where to go so I can buy both kit and bike or maybe bye one first and other later.

Would you know any online places I could go to get parts and a bike? I can get bike at price of $200-$300 but I would by the part a little later when paid. Its just I went to a website and found one that would be good and all but its almost
$700 thus is why I ask for help wondering hoe should I go about doing this. Think I should get bike first right then the motor and stuff afterwards, things is I don't know where I show shop for motor and other part that I would need.

I bought a kit before for my mountain bike but the motor did not fit on the bars of the bike so I tried bending bards in a little then realized the bike could break with the weight and all. Point is I don't want to waste money again like I did before so I like either experts help or someone better than I not that I am anything for this stuff hah just seems better for me.