I bought mine from Amazon. To me it was much better than buying from a store. I knew i was gambling a bit not having heard the sound quality in person but i love it. I also tried going into a local Tibetan store and actually purchased one but really nothing beats the price like on Amazon.

https://www.amazon.com/dp/B00K9GHXLY/ref=cm_sw_r_cp_awdb_t1_SnkqAb8HWZF58

I wanted a lower tone but not too deep so a 7" was perfect. I'm only suggesting this to you based on my preference. I also watched all the YouTube videos suggesting having to listen to the sounds before purchasing. But even with that advice, after searching for 2 days online and also having bought one in store I'm happy with my purchase through Amazon.