Here is the full list of all 40 Pickers achievements.
Find all 60 keys
Buy a Motorized Scooter from Hambone Richards
Explore every scene, hidden object game, and close up in the first 6 location
Maintain the leader position for 7 days
Combine a Suit of Armor with a Sword
Buy a Vampire Hunting Kit
Buy an Accordion
Buy a Movie Projector
Buy a Bigfoot Photo
Bring an owner's mood from angry (red) to happy (green) in one day
Reach the Number 1 Rank!
Buy a group of items at less than 65% of the asking price
Buy a Maffler Man
Restore all items before they are sold
Complete each hidden object game without using the scanner
Complete each hidden object game without using any hints
Buy a Sun Clock
Create 10 new items using the combine tool
Buy a Jukebox
Auction 20 items for a profit
Buy CJ Baxter's safe
Sell 5 items from Lizzie Davis' crawl space
Unlock all locations in the game
Buy a WWII Helmet
Reduce your store inventory to one page anytime after the 20th day
Make a profit 5 days in a row
Make a 300% profit in an auction
Buy a Snow Globe
End a day with Patrick Merman in a green mood
Collect 40 keys to unlock Unlimited Hidden Object Mode
Buy and sell 20 items from the Hot Category
Buy an item at less than 75% of the asking price
Consult the Expert 20 times
End a day with two or more characters liking you (in green)
Combine two items to create something new
Complete 5 unique hidden object scenes
Change a character's mood to green in one transaction
Complete a hidden object scene in under a minute
Buy and sell an item from the Hot Category
Restore an item