Escrow.com provides data on transactions, including the impact of China.
Freelancer.com CEO Matt Barrie (podcast) presented data from Escrow.com at NamesCon yesterday. There are some fascinating stats, especially when it comes to the impact of China.
Escrow handled $430 million of payments in 2015:
The average sales price of domain names transacted through Escrow.com has appreciated 7.3% per year:
4 letter domains have appreciated 9.3% per year over past ten years:
And perhaps the most telling graph of all is this one, which shows the massive upswing in transactions involving people in China beginning in 2014: