First, the rug you posted is very nice and price is ok. $ 2000 squaremeter is ok for low or medium quality rugs. Today, you can go to Iran and find rugs in the Tehran Baazar selling very good quality qum rugs wholesale for above US$ 5000 / squaremeter.
There is quite a difference between the rugs sold as qum. Lower price "Qum" usually come from Zandjan or Bonab - it is a lot like Nain rugs made in Tabbas near Meshed.
Chinese rugs have increased in quality quite a lot. Still most production is at the lower level. Many rugs on ebay are chinese but sold as iranian qum. I have seen chinese rugs wth qum design made so perfect and with such great quality that I would say there is absolutely no problem buying them instead of a cheap "Qum" from Bonab or Zandjan. But their price is also close to $ 2000 per squaremeter.