I purchased one from that seller almost a year ago and it has been fine.
During mfg Nova did not clear the shards/chads when they drilled through for the key to seat. It did have runout to start with but when I removed the insert and gave the inside threads a cleaning with a wire brush and air it was no problem and runs true. I have not seen them elsewhere for that price including the insert/shipping/taxes.
All tyranny needs to gain a foothold is for people of good conscience to remain silent. Thomas Jefferson