(Also published here.)
The first step has been completed: acquisition of the goods!
I mistakenly first bought a gen 2 for $10, which can't be used due to lack for free Spartan 6 license.
But today, a lot of 5 gen 1s arrived which were purchased for a whopping $45 on eBay. Here's the full family!
$9 per device is not bad, but I could have done better: there was another offer on eBay of 33 devices for the low low price of $150, though 9 of those were gen 2. Still 24 useable unit would be only $6 each.
But 5 should be sufficient to break a few and still have enough left for real projects.
The real work will have to wait until I get bored with the Color 3 work.