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