Gold Pendant Chain Adult Male

Hi all,

I am looking for recommendations on a gold pendant chain I could get. I am not very religious, but was thinking a coin could be cool. I'm 23 years old and starting my first job so was hoping for something of high quality that wouldn't break the bank (500 or less). Any help with brands or any advice is much appreciated.

Also didn't know if it's best to go to jewelry stores in person for this type of purchase or if options online are viable. I am super new to this so any help is much appreciated!

Thanks