I got the cheaper one from NY Barbell and I'm happy with it. I didn't have the patience to wait for one on craigslist.
If money is tight, craigslist or a wooden one is the right choice though. I feel safe in the rack knowing that I'm protected in case something goes wrong.
Note that the cement buckets is just a squat rack to hold the bar in the right place prior to starting squats or presses. It doesn't protect you at all. The other wooden one appears to be a full rack, just made out of wood. I'd think that if built well, like the picture looks like it is, it should be fine for several hundred pounds for an average lifter. You'd have to watch the wood for cracks & damage but it should last many years if not abused by dropping bars, etc.