I need new songs for my Ipod, any suggestions?

Please no modern music, I only really listen to Thrash Metal, 60’s pop/rock, Grunge, 70’s rock….50’s is good too! I don’t mean to sound like a Hipster, but no mainstream, radio-friendly songs. I am looking for songs that are hidden gems from the past.

Thanks.

p.s. For the love of god no AC/DC…