If you're looking to spend a lot less money here's a really
cheap volt/amp regulator. I suppose you could call it a fancy buck converter since it doesn't provide the AC/DC power conversion -- an old laptop power supply works well for that though -- and of course you need to provide your own chassis, banana plugs, and output/power switch in order to make it a useful benchtop supply.
Compared to Larry's or Terry's the big difference is that you don't get the expensive "isolation transformer" but if you don't know what the impact of that is then you probably don't care. You still get the same constant voltage or constant current control, however, and that's usually the thing that matters.
If you're
really cheap you can try one of
these and it also works quite well. You have to be a bit penny wise and pound foolish though, because after you've replaced the existing pots with panel mount multiturn pots and done all the work of building a chassis and bringing out the LEDs, etc., you will have invested much more time in it for the few dollars you save. DAMHIKT.