I'd use it. A new one with electronics won't work unless you hook up a 12V battery in-line. That one looks old enough it doesn't have electronics. Why sell it? It's gorgeous and will bubble up the washing soda pretty well.
I made one with a 110VAC to 12VDC converter that I got from the Surplus Center in Nebraska. Total cost was $11. It only puts out 6 amps, and I've often wished I had more amperage, but it is what it is. This picture was taken by a buddy of mine I loaned it out to--I have no idea why he put the baking soda in the picture.
I've used it a lot. Here is it in action:
I learned to call this process spooging, and it works great. Here are two '53 Chevy rear wheel cylinders that I pulled from a Bel Air that had sat out in the woods for 20+ years. They both looked like the one on the left before spooging.