A few questions about 80's OPC hockey factory sets

-What years did OPC make factory sets?
-Any opinions on the best or worst condition wise? What is the centering, corners, edges usually like? I saw the BBC Exchange had an 87/88 set for $125, I was thinking about that.
Any other info would be much appreciated.
-Any opinions on the best or worst condition wise? What is the centering, corners, edges usually like? I saw the BBC Exchange had an 87/88 set for $125, I was thinking about that.
Any other info would be much appreciated.
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