Looking through the Card Market this morning and this idea popped in my head. I myself am not sure it a good one or not, but thought I would throw this out to the community to see your thoughts.
Since the Card and Ship Markets uses averages of the last 10 sales (for cards), 15 sales (for ships), we end up with a nice Decimal.
We as sellers can't sell items for fractions so we must go higher or lower then this decimal point.
Example: Flying Dutchman (avg 3.5) You must list it for 3 or 4. (Above or Below)
We as buyers are always looking for "deals".
My suggestion is:
Anything that is listed "Below" the Avg Price is Green in color
Anything that is listed "Above" the Avg Price is Red in color
Let me know your thoughts