I have *one* mini scratchboard (Ampersand black clayboard) that I'm offering up as a commission. The scratchboard is a little longer than an ACEO card, and because I use a thin blade to scratch, it can still get heaps of tiny details (a lot more than a paintbrush or pencil).
Here is an example including the actual size: black-stag.deviantart.com/art/…
The price is $20 for black and white or $30 for colours airbrushed over. Postage will range between $2 and $10 depending on country.
Note me for more info or to grab the slot.