My moms boyfriend has a Pearl World Series kit that he would like to give me. I don't really know a lot about these. He said its from the late 80s or early 90s, 7 piece kit ( 3 high toms, 2 low toms, snare & bass), and he said he has around 15 cymbals ( mostly Zildjian A's and Z's) They have been in storage for about ten years. I'm mostly wanting some specs, and reviews on these drums, and I'm also wondering if the age and stuff would effect the sound of the drums. Any help?