High value ,Low cost system you ever Assemble

Ok cheap skates heres your chance, just keep it short, no free stuff ,if you found it in the trash thats ok.bottom dollar is what I am talking about.SECOND SYSTEM GARAGE, BASEMENT,SYSTEMS, I WANT THE DIRT ON IT.To start i have a B&O reciever $10 dollars garage sale.ajvc xl 555 cd player $15 from some guy i worked with .AR speakers, garbage picked.shack cables $? The thing sounds good in my garage after I have had a few brews.I may confess more .Later Yall
My god who moved the rock! J/K, Johnk sounds interesting, I may try to hunt and find a super cheap good system, like in the sub $500 range. A new challenge! Eureka, Best wishes.