hi can you play mp3 players on a sharp gf-7500 if it doesnt have a aux input thanks

FM transmitter. Do a search, and you'll find plenty of threads on fm transmitters. That's what I use for my boomboxes without aux-in. If you have phono-in, there are other options.

thank you

Two more options for you...

1) If it has a phono in, you can get a phono/line attenuator. Try www.mcmelectronics.com

2) try one of these:

MP3 Cassette

this will give any BBX with torn belts a tape deck revival. Very similar to my Digisette.