Yes, from late 2019 through the first half 2020 the S9s were simply not profitable at even just a few cents per kWh, so miners were liquidating en masse and buying newer models. Example:

Of course, that was a MOQ of 20,000 units but on ebay, craigslist, telegram groups, and such there were many available at $50 and under in 2022 (down from around $200 in late-2019).

Source: https://data.hashrateindex.com/asic-index-data