All of the NFTs were purchased by the same wallet – 808450 – and for much higher than their previous sales, seemingly out of the blue. For example, Fidenza #459 last sold for 0.29 ETH, or about $687, on June 11, 2021. Fidenza #726 last sold on June 14, 2021, for 1.2 wrapped ether (WETH) (approximately $3,098) and Fidenza #18 sold on July 15, 2021, for 8.5 ETH (approximately $16,294).