NewEgg.com has the ASUS EAH4670/DI/512MD3 Radeon HD 4670 512MB 128-bit DDR3 PCI Express 2.0 x16 HDCP Ready Video Card for $67.99 - $30 Rebate [Exp. 11/17]. Shipping is free.
NewEgg.com has the ASUS EAH4650/DI/1GD2/A(LP) Radeon HD 4650 1GB PCI Express 2.0 x16 HDCP Ready Low Profile Video Card for $54.99 - $20 Rebate [Exp. 11/30]. Shipping is free.
NewEgg.com has the IOGEAR External DVI Video Card GUC2020DW6 USB 2.0 Interface for $69.99 - $20 Rebate [Exp. 10/31] = $49.99. Shipping is free using Newegg CouponEMCMLNN52 [Exp. 10/28].
NewEgg.com has the ASUS GeForce 9600 GT EN9600GT SILENT/2D/512MD3 Video Card for $94.99 - $20 Rebate [Exp. 09/30] after $10 off Newegg CouponVGA9161 [Exp. 09/23] = $64.99. Shipping is $7.56.
ZipZoomFly has the HIS H487QT1GP Radeon HD 4870 1GB GDDR5 PCI Express x16 (2.0v) Video Card for $169.99 - $10 rebate [Exp. 09/30] = $159.99 + Free Shipping. [Exp. 09/17]
NewEgg.com has the ASUS EN8400GS SILENT/HTP/512M GeForce 8400 GS 512MB 64-bit GDDR2 PCI Express x16 HDCP Ready Video Card for $32.99 - $10 Rebate [Exp. 07/31]. Shipping is free.