Staples has the Verbatim Producer DVD+R/+RW on sale for $179.94 after a $60 rebate. This drive used to be based on the Ricoh RW5125A. However, most people are now getting the ND-1000A from NEC.
You can also pick this drive up online, and use a coupon to drop the price down to only $149.94. This is one of the lowest prices I've seen on a DVD+RW drive.