Yes, beckett's probably. I used to collect in about 1994 myself. The "REAL DEAL" is that they are worth what someone will pay you for them. I have a near mint Cal Ripken rookie card. In PA I have yet to be offered more than $20 for the card and I paid $30 for it many years ago.
In real life, you are very licky to get half of "book" value unless it is an exxtremely rare and desireable card.
I don't even know the set you are mentioning, but I bet the real value is less than $20. Sad, but true.
Good luck with it.