Quote: 4inCreation[...]it really depends on how much each individual collector values it.
I completely agree.
I am, however, of the opinion, that the figure simply *working* makes it potentially more valuable just because it opens the market to more potential buyers.
If 50 people want a non-working Hot Dog, it's worth $1 more than however much the #2 guy is willing to pay.
If 51 people want a working Hot Dog, it's still worth $1 more than however much the #2 guy is willing to pay - but the more potential buyers, the more wallets you have to pick from.
That's just assuming the market you are opening up to would pay more for a prototype than someone who really wants it and doesn't care if it works or not.