Newegg has a Radeon HD 5830 for $99.99 after coupon code: EMCKEHK42
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102878&nm_mc=EMC-IGNEFL052011&cm_mmc=EMC-IGNEFL052011-_-EMC-052011-Index-_-DesktopGraphicsVideoCards-_-14102878-L07B
It's the best price I've seen for a 5830, especially without a rebate.
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102878&nm_mc=EMC-IGNEFL052011&cm_mmc=EMC-IGNEFL052011-_-EMC-052011-Index-_-DesktopGraphicsVideoCards-_-14102878-L07B
It's the best price I've seen for a 5830, especially without a rebate.