It depends on the level of quality you're looking for. I've put some cheaper Peer, KML, NTN, and FYH bearings in several machines. These varied from 52mm to 72mm O.D. bearings. For the most part, these hold up fine in the relative short term (3-5 years?) giving them decent abuse in local muddy conditions and some of the nastiest stuff Busco Beach can throw at them. These lower-end units were typically standard (single) or double-lip sealed units. The triple sealed Timken/Fafnir insert bearings are really high end pieces and I'm running them in a couple machines as well. They're a lot more pricey, but I'm anticipating having to replace them a lot more infrequently for the amount of riding I actually get around to doing.
To answer your question more succinctly, yes: $11.36 each. Typically, these are KML brand, but that may have changed.
HC207-20 1-1/4" Cam Locking Insert Bearing Large OD
::EDIT:: ... .and for goodness' sake, eBay, eBay...eBay... I've purchased from these guys, too. They combine shipping to an extent.
HC207 20 China New Ball Bearing Insert | eBay
Now THAT'S scraping the bottom of the price barrel. These could very well be the same bearings that the BigBearingStore is offering above.