IBM M1015 flashed to IT mode for just 8 sata ports. $100 on auction sites. You'll need sata breakout cables.
Supermicro AOC-SASLP-MV8 and SAS2LP-MV8 are about $100 new but does not support raid and the latest firmware supports large drives
Their AOC-USAS2-L8i ($140 new) supports raid0/1 well (dont waste your time trying to run raid5 or 6) is an LSI card but is meant for a server so to use it in a standard pc you will need to change the bracket (not included) or modify the existing one to work on a pc. This can also be flashed to IT mode for just sata ports.
Edit - please do your research, some card do not work well if there are other controllers on your motherbd, like marvell, asmedia, jmicron...