In Europe the price is �59 (or $64) for a single HD video, so I don't think it's much cheaper than in the US.

Maybe the buyer bought a big 25-pack, got a discount, so you got paid less. Was it an HD sale?

I often get $20-$23 for an HD sale. It's not the biggest return per download, but it's not too bad. Even though I think we should get at least 50% commission, like on Pond5.