bruyanxuan upgraded 520820 521099 oem suburban 12v dc rv furnace control circuit module board compatible with sf20/25/30/35/42 nt12/16/20/24/30/34/42 & dd-17-dsi, direct replacement for 520741 520871 is up for auction in Automotive. The current bid is $0.15, 100% below the $31.66 MSRP, in New/Like New condition. This auction has ended — similar items appear in live auctions regularly.