The good news, Whites are second to Singer in parts availablity- EXCEPT if you need the long shuttle for a VS machine - those are spendy!
But with the Rotary- this was White's main machine, and though they made changes with the newer ones (that plate you need is different between older and newer).
I'm pretty sure this one will also take "singer" size needles, but I'm not positive on that one. I know the early Whites took a much longer needle, but don't know if that was the same for both the VS and the Rotary, or only the VS machines.
Does it come with the bobbin case and any bobbins? While they are not hard to get, it does add to the cost.
If this machine was "whole", $125 is a great price. If it's got the bobbin case, then I'd still be OK with the price.
But then, I already have all the missing parts on hand, so I'd not need to spend anything more to get them.