A question for anybody with a record player?

My mom wants a record player for her birthday that plays 45s. What exactly is a 45? and will this record play them
http://www.target.com/Crosley-4-1-Music-System/dp/B000HQ6I0S/sr=1-5/qid=1221320110/ref=sr_1_5/602-5618607-3957456?ie=UTF8&index=target&rh=k%3Arecord%20player&page=1

Where would i sell an old record/stereo player?

i have an old record/stereo player that use to belong to my grandmother..my mom use to play when she was a teenager(she's 63 now) where would i sell something like that...can anyone help me out? i live in moreno valley ca.

Old Music Box?

I got a old music box that belong to my great grandma. My Mom give it to me along time ago and now I want to get it restore so I can give it back to my Mom. ( My Mom was really close to her grandma. ) I want to know is any place I can take it too or can I call anyone to get it fix.