WWW.nobetterdeal.com
Check out their stroller section. Somedays there is nothing. Some days (like today they have a Vista for $290 and a bob rev for $209.
If it says unavailable it means someone has bought it recently or it is in someone's cart (and they could still drop it)
Happy hunting!
(ps. I didn't score either of these. I saw them while stalking a car seat. They have great deals on those as well.