I purchased mine from qualitymatters.com (no affiliation with them, just found the best price via Google):
$599 with free shipping, and if you order bags at the same time, that shipping is free too. I ordered it over a weekend and it was delivered the following Thursday, along with the bags that shipped separately from the manufacturer.
This looks like the least expensive chamber sealer available so far. I wish it would seal only without setting the vacuum cycle to the minimum time (5 seconds), but I've been able to easily create smaller bags from the large bags I ordered. The bags tend to move a bit if empty, slipping off the sealer bar, but the "filler" plates can be used to hold them in place, slipping the bag betweeen 2 of them.
From Dean's review, it looks as if I can do the same by reversing the position of the bag, placing where I want the seam on the sealer bar and letting the rest of the bag hang out the front of the machine, letting the cover hold it in place. I'll give that a try later today!
The "filler" plates simply take up space for smaller jobs so that the machine has less space to have to vacuum, making the process a bit more efficient.
I haven't used it much yet, but I can post additional info as I learn more about it. It's nice to have a bag of egg whites in the fridge that won't leak as easily as a zip-loc!