Goonies
Maybe you can't see it well from the pictures but the inside art has a stunning printing quality, with a beautiful golden/copper shine effect on the whole map lines.
The front is ok, a bit plain on shadows and the yellow title doesn't pop up so much, but the picture on the back looks really fine.
Blade Runner
Looks the very same german version plus the inside artwork and a bonus disc.
So the back is a bit plain and the front shines really well. The inside looks ok, just quite dark.
The second disc is a DVD with a making off documentary on and some other extras.
300
It's a beauty. There's a nice golden light effect everywhere on front and back that turns out stronger on the metallic shapes of helmet, shield and spears.
The inside artwork looks very good, really brilliant picture choice.
In conclusion the all three steelbooks are of an average matte (nothing to scream about or cry for joy) without particular high quality finishes or spot glosses, but in hands they seem well printed and don't look cheap at all.
I think that's a really good start to increase the poor italian steelbook catalogue, good job WB