Downsview Auto??? in toronto.....good/Bad?

Does anybody know anything about "downsview auto" ? They're at 1230 sheppard ave w. in downsview(im uming its part of toronto). They advertise lots of Mazda 6's for cheap, which is what im interested in. But how do i know if i can trust them??? I tried researching them online, but i cant seem to find much