I understand these shows are "all the rage" overseas, but I don't understand the attraction. What I see is two guys driving around looking at previously loved items and offering a price to buy. They then bring it back to their shop. So they "pick" a pinball for $150, then "value" it at $400. But I've never seen the items SELL to anyone. To me, it is just an appraisal.

Is that how it works ?

That is pretty much it! The enjoyable part of the show for me is when they come across old interesting stuff. I admit it would be more enjoyable to follow the item thru to restoration then sale. I am sure there is another show which revolves around the restore part of this.