I went in to pick up some positioning dollies yesterday and found my store had only one set, but I needed something for all 4 wheels. The staff member suggested these but I didn't want to spend that much at full price. He then said if I could wait until tomorrow (today) they were going to be on sale.
No comment on quality - I've put in a C&C order for later today - but I'd imagine that they'll be fine for occasional use, but for anything more than that you'll probably want something of higher quality.
NOTE: They're sold individually (for some strange reason)
So you are commenting on the quality, negatively, just because they aren't expensive, without having seen or knowing whether that opinion is justified.
Unless you run a motor race team these aren't products you are likely to use often. So, aside from what quality/durability you need, the other option is that you rent them when you need them.