I have a Presto pressure cooker that was probably made in the 70s...or earlier--and it's still going strong. The Presto on Craigslist is like the All American, in that it has no gasket.
[ I have a Mueller immersion blender too, and I have never liked it. I may go back to a regular blender if I can't find another stick blender that won't make me cuss, while using it.
I highly recommend the Vitamix, though it is pricey. I watched a lot of immersion blender reviews and most say that the "bell-shaped" blade housing is much more effective than the flatter ones. The Braun Multi-Quick 5 is the Cook's Illustrated recommended brand but I went with the Vitamix.