don't think that's a scam site, though it probably has a healthy profit margin. that price is within the range of normal for a fully built surveying drone for use by people who aren't interested in getting into the technical details of pixhawk/ardupilot/arducopter stuff and building their own. They're sold to surveying companies, mining companies etc.

go look at pricing for the DJI Matrice 30 (M30) for some comparisons...