Psh... I posted a thread dedicated to the Sigma EF-530 ST for $99 a while ago but it got pushed down over time...
I'm not holding any grudge or anything
But, yes, it is a good flash. And I still suggest it. Even if it only has two manual modes and doesn't have HSS.... or wireless P-TTL .... (what else? heh) It's still good for a first flash or if you just need a back-up. I managed to use it this Tuesday for an indoor soccer game - I was right on the sides outside the nets taking pretty good photos. The limit of a 1/180 shutter speed was enough for the pretty fast pace of the game.