Exactly, that's precisely why I think i could've got more if i hold on to it. But I'm happy with the ROIFor an EMD phrase with a popular country code extension, I think it's worth more than $400. With the need to get things done remotely, freelancing is being embraced than before.
Congratulations on your sale though. Since you made a decent ROI on it, I don't think there is anything to feel bad about.