I want to thank everyone for their hardware recommendations for playing backing tracks.

I just happened to come across this piece of DJ gear in a Mom & Pop Music store.

Cortex HDC-500

I just started playing with it and it seems like it's going to do the job for me.

It plays MP3 and wave files, has two USBs for flash drives, hard drives or even a computer keyboard.
RCA and XLR out.

Thanks again everyone.

Bill