Not to try to ruin your sale, but having kept a A. mata in the past & seen how fast they grow, any tank it goes into should be at least 6' long and 180g. They grow about the same size as most Nasos & Unicorn tangs do in captivity, except they can grow an inch a month (at least mine did).
Good luck. For whoever buys this fish, feed it lots of nori. Mine loved seaweed sheets even though A. mata are normally planktivores. It will also eat lots of PE mysis or small krill. Anything else will be too small, in general.
You should post a pic so we can all see this fish
Anthony