You could be sitting on a gold mine. If lucky some Beatles, Rolling Stones, Sex Pistols, Bob Dylan and U2 among others are now worth in the five figures. Even a few Madonna records will fetch up to 7K. Only if one knew. Let's see $1000 worth of Thriller albums bought in the mid 80s would net today $25,000 in good condition (signed copies have multiplied in value 350 times especially after his death). Taking inflation into account, that would have been worth about $57,500 in mid 80s value.