Just doing a post to log the best prices I have found using the seasons mod and Dusty Cove map.
If you wish to play through the game without knowing the following info. Then please stop reading now or do not open spoiler link.
Scenario....Started a new save with just seasons and ffwd mod. Took out a bit of a loan so stayed in profit (in case it made a difference).
Set seasons to 3 day season and logged the animal prices at 1am and at Noon (12.00). Used ffwd mod to skip between days/seasons. Allowing time to catch up before taking readings.
The following results as followed. (May differ in different maps). This is for Dusty cove.
Best price/ time to buy is highlighted in GREEN.
Worst price/time to buy is in RED.
It seems the prices change at Midnight of the season sessions (1-2-3) start. Did check at noon/mid season (3day season setting). The price was the same.
Please open spoiler to see results. Done it with spoiler as some people prefer to play blind and work things out themselves.
Hope this info helps and please feel free to leave comments and any extra info etc.
kwaka.