I am thinking of buying a GPS to go geocahing, but in order to do that i would need to enter coordinates into the Gps. I need it to be cheap like 100-150 is that possible?

I am looking for a mobile handheld gps device that has the capability to enter or type in an address of a residence or street address and then it takes me street by street to that address. Please help me by giving me the name of the gps device so I can look at it. Thanks.