Call a few other bike shops and see what they have in stock.
If you are not buying an expensive bike the wheel will not be that expensive anyway. Ride the bike around and if you like the frame then upgrade the wheels. Sell the old ones.
check craigslist/ebay and see if there is anything decent and used being sold locally. Use the money you save to upgrade the wheels. Phil Wood sells a nice rear hub with a extra thick shaft.
2000 Montague CX, I do not recommend it, but still ride it.
Strida 3, I recommend it for rides < 10mi wo steep hills.
2006 Rowbike 720 Sport, I recommend it as an exercise bike.
1996 Birdy, Recommend.
Wieleder CARiBIKE (folding), decent frame.