I bought the cheap plastic cone holder, too, and stacked up some heavy washers we had around on the base. If I had wanted to go buy a couple of heavier ones, the stack would be shorter.
I agree that most things that are aimed at a specialty market are overpriced, examples given such as marine also RV or camping.
We frequently try to find a similar item in a regular store or buy using 50% off sales or I will buy machine needles, rotary cutting blades in bulk on Ebay. In fact, I've got so many blades from a buy 2 or 3 yrs ago I haven't had to stock up on the 50% off sales.