What's it worth original 1985 arsenal track top

I got this track top handed down from my Granda who had it over 30 years. Its in amazing condition never worn and the zip still feels tight. If I sold this how much would I get. Its a size medium. I’ve got plenty of pictures to show how good it is.

This is not a Chinese knockoff the tags inside say made in England which today is harder to come by. Please help me out ifyou know any people or place I can sell it but please no time wasters.