My experiences with skyauction seem to line up with other comments here. Won an auction last year to travel GRR-CDG on CO and received requested dates, good service and a reasonable price ($440). Then early this year I won a GRR-BRU and also a GRR-DUS for less than $320 each. Had nothing but problems with slow/poor service response, no available dates unless I accepted the upsell of anywhere from $80-$140 and then significant problems getting them cancelled because the itineraries were unacceptable to me. I am suspicious that the low winning bid on these automatically made my dates unavailable unless I was willing to throw more money at them. Won't use them again.