Ahhh nice to see something different.
Now if you think a set of 12 Palitoys are hard to put together, you should try 12back Meccano's.
Sadly they do not reach the priceless mark, but where collecting used cardbacks has become so popular, they will probably go for a far higher premium these days compared to about 5 years ago, so if you're selling, I'm sure you won't be disappointed with the result.
They still have their POP's intact too, which are mostly found cut out for the mail away Meccano Cardboard Display.
However if you find them carded, expect to pay a hefty amount.
Dave.