I think it is a good buy and it is definitely sturdy.
One use from SUN was to plant the masive MCM 2110 Engine tester on top of it.
And that rack weighs at least 120 kG.
And sorry for the following hijack.
I know, because I have one, completely overhauled and with all cables and manuals with it. I will happily sell the whole machine for US$ 1200, but buyer must pick it up here in Sweden. I have desparately tried to find it useful, but I realize now that it will require a steady flow of work on pre 1995 cars to be useful. I have tried it out on a MB190E and a 420 SE, works perfectly.
Please PM me for details. Send me an email and I will return photos.
Ola