I just wanted to share my experience with BuySellMiners.com as I have recently purchased AND RECIEVED my s19a. The entire process took about a week from purchase before I was mining. This is a huge thing to me as I have an L7 currently on pre order with not much motion from Bitmain. The prices are actually a few hundred cheaper than I’ve seen elsewhere. Also, I have used this site before to purchase a replacement board for my whatsminer m30s, the stock of boards is always changing so keep an eye out if you need anything.
If anyone else has any opinions please feel free to share.