I got the pictured one's through my door for £4 which is about $6. Purchased for a customer, they found themselves on my bike when my ~$25 Wellgo's failed. The bearings feel perfectly smooth and offer no detectable play. They weigh in at a remarkable 320g a pair and I have no issue cycling in my steel toe-capped footwear. The platform is about 20% shorter then the wellgo's, which I would consider 'full size'
I was lucky at auction, but they are a cheap pedal. I just can't see why I would spend more though. Perhaps the casting is the hidden weakness, so 200lb athletes would bust them. They make great pegs though. Unless you simply must have something machined, I think most people would be happy.
Equally smooth have been two $25 sets of a more traditional design to mountain bikers http://www.ebay.co.uk/itm/New-pair-bike-BMX-aluminium-alloy-road-mountain-clipless-bicycle-pedal-POCOOL-IP-/381124043314?pt=LH_DefaultDomain_3&var=&hash=item58bcc36232
In all honestly, I don't care for the drag of sealed bearings. I'm happier setting up cup&cone's to my own requirements. I just can't get any. Hand assembly with great care is ancient history. Everything is just banged together. Perfect balls and races might come off the machine, but them someone will crush them and cover them in tar anyway. I have stood in many shops twiddling many a pedal, but am yet to find a cup&cone in good condition.
My follies into BB purchases from ebay turned up shimano branded units that felt like the balls were climbing over each other. Our desire for cheap sealed bearings has produced cheap sealed bearings. It was inevitable.
I'm happy with either of the two pedals above, depending on Road or Mountain use.
I'm not drawn to removable studs. I see they go missing. I have not seen the cast-in studs cause any problems though. The chances of me grinding one off are slim. I find my pedals fail at the bearings. So the cost of removable studs never repays itself. Though I wear steelies all the time and I do look at new pedals to make sure they interlock with my treads well. Some combinations just don't work. Or only work when dry. Them pins are very compliant though. Not for leather soles though. You could damage your shoes.