NameSilo (an advertiser here) released their marketplace stats for July
Average transaction size $462 while the highest transaction came in at $21,990.
94% of domains sold were .com.
The average sold domain was nearly 5 years old since it was first registered, coming in at 4years 8 months.
Average number of days between a domain listing and sale: 204.
9 was the lucky number for most sales by character length.
Hopefully in the future they can go deeper, maybe list some of the actual sales, like what sold for $21,990?