The pump looks exactly like my pump that I use in my woodworking. Mine was a Christmas gift, but it was purchased on Amazon for around $80.00. The pot looks like a presto brand pressure cooker that can be purchased many places for sub-$100.00.
http://www.amazon.com/Presto-01781-23-Quart-Pressure-Canner/dp/B0000BYCFU/ref=sr_1_10?ie=UTF8&qid=1454422918&sr=8-10&keywords=pressure+cooker$90.00 for this pressure cooker that holds 7 qts. They want 300.00 for theirs that's been modified with gauge, valve and hose.
The misc adapters and vacuum gauge would probably be less than $30.00. Your local hardware store would have all the 1/4" NPT fittings and ball valve to connect everything together.
So, unless you have no ability to fab this up yourself, I think it's a bit over priced, but then you are paying for the parts and labor to assemble.
Here's an alternative, look at ebay for vacuum chambers (used for mold making).
http://www.ebay.com/itm/2-Gallon-Vacuum-Chamber-and-3-CFM-Single-Stage-Pump-to-Degassing-Silicone-/321778500697?hash=item4aeb7e4459:g:SLgAAOSw7hRWQjGsThese generally also have a clear lid/top so you can see what's happening with your seal (not too big of a deal for canning but for what I do I have to regulate the vacuum to avoid foaming.
I have a one gallon container that I use for saturating wood with a resin type hardener.
The foodsaver brand vacuums are OK, the most I've seen them pull is around 20 to 22 inches. My vacuum pump will pull 26+ in of mercury (depending on weather and other factors), and I run it for hours at a time.
The advantage to using the canning pot and vacuum pump over the foodsaver is the ability to vacuum can multiple jars at once, where as with the foodsaver you are limited to one at a time.
And just as a point of reference, foodsavers last no more than 2 yrs in my house. we use them so much we fry the pumps.
