Buickpickup

I own a 1928 Buick pickup. I know they are verry rare to say the least. I was wondering if anyone my know what it might be worth? My grandpa owned it from 1965 to 1990 when he died. It was 90% restored at that time. Since then it has seen better days due to many reasons that are not important. If anyone has any imfo please contact me @ 208 899 3803 Thank you all for your time