I, too, can vouch for SkyAuction. Last winter (Jan., I think) I bid and got a RT ticket between Baltimore and Manchester, England on United Airlines. The ticket was about $450 with taxes -- a good price for my travel dates (Sept 1 (Labor Day weekend) to Sept 8 ). I got my first choice of travel dates ( it probably helped that it was about 8 or 9 months in advance). In my experience, they don't ask for a credit card when you register. If they can't work out your schedule with what is available, you're off the hook.

Kristy Rocky Mount, NC