How can I buy rvn and transfer it to my rvn wallet?

Hi. So I've been mining rvn for a little while now, and used the wallet on the ravencoin website. Been trying to find the answer to this for a while now, but always seem to find irrelevant results. How can I buy rvn and transfer it to my rvn wallet? I'd rather keep it on my hard drive, unless thats not a good idea? Thanks!