We have just entered the fourth quarter for 2019 but the total number of reported domains sold have already surpassed the full year numbers of 2017 and 2018. The total sales volume from last year is only $6 million behind 2017 and already surpassed 2018. Looking at the last 6 months of domain sales, 2019 should surpass that without a problem.
Here is the data from Namebio:
I broke it down by number of .com sales and sales volume, followed by number of total sales and sales volume.
2017 number of sales 66,280 (.com) $97.5 Million (.com) 80,804 (total) $119.2 million
2018 number of sales 69,904 (.com) $88 million (.com) 82,822 (total) $109.7 million
2019 number of sales 72,631 (.com) $97.6 million (.com) 84,434 (total) $113.6 million