Caching422

Hey I'm Caching422 and I'm actually relatively new to geocaching but i find it to be so much fun to do that my school work is now suffering a bit.. opps. anyway i just recently started and i dont yet have a GPS unit i was wondering what units are good for people just starting out like me and also which were on the slightly cheaper end as i am a student so therefore broke... Any suggestions? and I was also wondering what types of terrain people find are the easiest to cache in. Thanx much! ~Caching422~