International Music System / Patricia Harris

A look back to the mid-80s with this double A side of 2 absolute classics: International Music System - ''Dancing Therapy'' and Patricia Harris - ''Heaven Is... (In The Back Seat Of My Cadillac).'' These 2 tracks greatly influenced the house sound of Chicago. Well sought-after by DJs, these each go for $50-100, if you can find them.

• 1 dancing therapy
• 2 heaven is