Great news if you're a coin dealer who isn't holding a lot of stock or a collector like me who hasn't yet reached the point of chasing down the key dates. For those with well established collections, the GSA nightmare returns.
https://www.coinworld.com/news/us-coins/2018/06/silver-dollar-hoard-from-1960s-government-sale.html
Dates affected are 1878-S, 1880-S, 1881-S, 1883, 1884, 1884-O, 1885, 1886, 1887, 1888 and 1889. Expect the prices of these dates to diminish sharply in premium grades and a knock on effect for other dates. If you're in the market for higher grade specimens you might want to put any negotiations on ice. Fortunately, or unfortunately, depending on your perspective, there are no reported CC mint marks, but at the risk of being labelled a conspiracy theorist by the gullible, it's not beyond the realms of possibility to consider that such information might be kept quiet until the power sellers can unload their stock. The incestuous relationship between grading companies and volume dealers should need no explanation to anyone with more than a few month's experience.
Make of it what you will, but it's inevitable that there will be a significant downward movement in this part of the market. Act accordingly.
You're welcome.