In your opinion, which micro will be worth the most down the road? Not just the brand (i.e. Microsizer, ZipZap) but the make and model. Something that is actually/or was on the market.

Don't say the Bit Char-G prototype. :P
Here's my opinion, but I want to hear everyones opinion and why.
I think the original Zips that are now off the market will be worth the most. Here's why....their numbers are a lot lower then Bit's and Sizers. Thousands of people wanted them, yet couldn't find them or weren't willing to pay the ebay prices which I don't blame them, but now they're gone. I'm using this theory because of what happened with my Star Wars collection. The most expensive action figure from the original Star Wars movie is the Hammerhead figure from the bar scene. Why? Because they made very few of them, but it wasn't popular. Now you see my confusion.

Let's hear what you think.
We're at the beginning stages of a technology that is only going to get better. Which car is going to bring all us oldtimers to the auction block in 40 years?