I know 4 friends who having booked flights and hotels then struggled to get tickets over the internet eventually going through viagogo
They had to buy 5 because the above firm wouldn't sell them 4 together, they paid £280 for 5 tickets with a stadium value of around £10 each after adding the fees etc and a not insignificant mark up.
They are left feeling very disappointed of having been completely ripped off by what they see as plain profiteering on a grand scale, and are now questioning if they will bother with GP,s abroad in the future.
It will be interesting to see what the real attendance will be on the day but this isn't a good start for the Warsaw GP.