Vintage T-Shirt Forum & Community Authentication Appraisals

Looking for an approx value and age of these two shirts.
I have just been given a bulk lot of 120 or more vintage Harley t shirts, any tips on telling their age or value?
All sized XL. The botton shirt says "acme merchandising Sydney" under the tag.
Thanks!

Nice score. I've never noticed any bear related ones being heavy in value. Eagles and pigs are the animals of choice. But always worth a shot. Make sure "Harley Davidson vintage t shirt" is always in the title and the Harley heads will find you. What other ones do you have up your sleeves?