Lowest price I could find for the Intel 530 series SSD, and for the Corsair Force LS on ebay, staticice.
Edit 1: Corsair unfortunately is store only. Not sure about the reputation they have vis-a-vis others in this segment, but there's nothing else out there for under $70 except the Kingmax at PCCG.
Intel 530 series is a close cousin of the 520, with slightly slower performance (not by a lot), but lower power consumption. Still uses the Sandforce 2281 controller, but is a good buy with the 5 year warranty.
Performance Specs:
Intel 530 120GB
Sequential Read: Up to 540MB/s
Sequential Write: Up to 490MB/s
Random 4K Read: Up to 41,000K IOPS
Random 4K Write: Up to 80,000K IOPS
MTBF is 1.2 million hours
Corsair Force LS 120GB
Sequential read speeds of up to 560MB/s
Sequential write speeds of up to 535MB/s
Random 4K Read: Up to 50,000 IOPS
Random 4K Write: Up to 62,000 IOPS
MTBF is 1 million hours
Edit 2: Original link doesn't seem to be working. Try these -
Intel - http://www.centrecom.com.au/intel-120gb-ssd-530-series-550mb…
Corsair - http://www.centrecom.com.au/corsair-120gb-25-force-ls-series…
does the 530 have pick up option? Good price if so. I like the intel drives, great reliability and good software to let you know what is happening. Particularly good for older systems that don't automatically use trim, as you can use the software to force it.