Hilarious post/User name combo.
Anyway, I don't see any danger here. Looking at the pics the HOB filter/tubing/plastic etc etc would have liquified at or below 400F. They would have deformed at much lower temps which they obviosly didn't do. I think the tanks are fine.. Buy em, try to clean em up or use them for sumps or something. Glass will be totally fine and almost certainly so will the silicone.
On the flip side, if you hear/see that any portion was charred or started to melt just walk away. Free still wouldn't be worth the cleanup of a blowout and dead fish.
Anyway, I don't see any danger here. Looking at the pics the HOB filter/tubing/plastic etc etc would have liquified at or below 400F. They would have deformed at much lower temps which they obviosly didn't do. I think the tanks are fine.. Buy em, try to clean em up or use them for sumps or something. Glass will be totally fine and almost certainly so will the silicone.
On the flip side, if you hear/see that any portion was charred or started to melt just walk away. Free still wouldn't be worth the cleanup of a blowout and dead fish.