Staples has a $20 rebate on D-Link IP Cameras this week which makes which
coupled with a $25 off of $75 coupon (google it if you don't know about the
coupon) makes these as cheap as you can find.
The DCS-930L: http://http:http://www.staples.com/D-Link-DCS-930L-Wireless-N-N
will be $34.99 AR/AC and the DCS-932L: http://www.staples.com/D-Link-DCS-932L-Wireless-N-Day-Night-Hom
will work out to be $54.99.
I have a DCS-930L and would recommend the 932L since it has IR lights. I
also have 4 Foscam cameras, however with family and friends asking me for
help I think D-Link is the way to go for them since after the initial setup
these things just work, no need to change IP addresses in apps, etc as you
do with my other cameras.