A week or so ago, I created a spreadsheet detailing the 3.0 versions of the purchasable seeds, saplings and livestocks. The spreadsheet includes the climates that the crops now have (some have changed), and the prices for the items (either in gold or vocation badges).
You can view this spreadsheet here! (Google Sheets file)
The locations where you purchase these crops and livestock have changed. For seeds and saplings that are paid in gold, the NPC that looks like a sapling merchant has them. For the livestock paid in gold, the NPC that looks like the livestock merchant has them. For the vocation items, the NPC that looks like the seed merchant sells them.