Value of Rock T-Shirts?

I have over 80 clic rock t-shirts from 1978 to 89, and they are the real deal: zz top, queen, van halen, kansas, the police, foreigner, guns-n-roses, allman bros, acdc, blue oyster cult..and a whole lot more.. i'm just wondering if anyone out there knows the value of shirts like that and if i should hang on to them for a while. (Sorry i'm not trying to sell anything quite yet)