They're really inconsistent; they just occasionally spike, and are - as such - no reliable counter.

Around the time of the sale and the month prior to and after the sale, buyers were below 10. Occasional buy order overcutting back in february had led to them being at 24 after which they dropped back again to ~8. In April they started slowly overcutting to reach ~15, eventually reaching over 20 after which they dropped back to ~15 again, and the process is repeating itself. Without any on the market at the moment, its unlikely we get new data, so accepting as is here.