I happen to have a $350 ( RT) voucher for USairways for sale ( must be booked by Aug 19th). I'd sell it for $200. Looks like you could fly for $174 each way, fits the voucher perfectly, but has stops.
http://shopping.usairways.com/Flights/BuildItinerary.aspx
I'm trying to sell it to somebody locally ( Ct) have a couple of people interested in it, I expect a couple of calls tonight on it.
Try this around Dallas first, if you wanted to deal with me you'd have to Moneygram me the $200 and I'd Fed-ex you the tickets. I could give you the needed info once paid so you could book, you'd need the paper certificates to board.
Time for wilheim's warning in 5,4,3,2,1....