Shereen,
oriental rugs all together is like an ocean and my knowledge is a drop of water. I am also learning every day, this is what is so fantastic about rugs - it never gets boring. And if you have the virus, you will never get rid of it (as you know :-)!)
Matas,
your rug is not so old, my guess based on the pictures is around 10 - 20 years. The are not very common in Germany or US, you find them often sold by poeple who brought them from a trip to Marocco (and often paid a fortune for it)or in Spain and France. In the last few years some maroccon dealers started offering them online in webshops, often along with tea glasses, maroccon iron lamps and other handicrafts from north africa.
EURO 500 is ok, might have been a little cheaper, but if the rug is nice and condition is good, what is some money more or less. The quality is good and you have not been ripped off.
Viele Grüße aus Bayern nach Berlin - und auch nach Conneticut, Shereen. Euch einen schönen Abend!