I got one from amazon italy for around £40 a year or so ago, it does make a nice pizza in about 3 mins, much better than using the oven and not far behind our wood fired oven.
We use it loads in the winter or if we just want one or two pizzas and don’t want to wait an hour for the big oven to heat up properly.
Not sure I’d pay £100 for one though.
Only does one at a time? Nothing worse than a pizza night and having someone wait for a pizza.
If you get a rhythm up you can be preparing one while one is cooking, they only take about 3 mins so unless you’re feeding the 500 it’s not too bad – we can only really do one at a time in the wood fired oven as well.