Well the OP's jacket is a lot older than Apples 'Drake' jacket and those jackets sell in the region of $800 to $1000 (brand new condition looking ones). It looks like the father in laws jacket is in very good condion for it's age, no rips or tears, colour has not faded, not even on the patches. If the OP can get his father in law to write and sign a COA (Certificate of Authenticity) explaining how he came about getting the jacket with the year stated he got it, it would add more value to the jacket because it has only been in his hands all these years and it is something that came to him direct from Apple themselves, it was not something he purchased, not something that has been bought, worn then sold many times before.
As for price, it all depends on how much the desire is to get rid of the jacket. It is going to be very obvious that any potential buyer is going to try and get this jacket for as cheap as possible. This jacket is a lot more rare and thus more valuable than the Apple 'Drake' jackets and thus I would put a reserve price of $1000. It's worth a lot more in my opinion and should not be sold for less that $1000. If no one is prepared to buy it that price then keep it in the family because it is a nice piece of Apple history to own and more so because of it's link to your father in law.
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