Here is the full list of all 40 Pickers achievements.
Combine a Suit of Armor with a Sword
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
Find all 60 keys
Consult the Expert 20 times
Unlock all locations in the game
Buy a WWII Helmet
Buy a Motorized Scooter from Hambone Richards
Buy a Snow Globe
Reduce your store inventory to one page anytime after the 20th day
Buy an Accordion
Buy a Jukebox
Buy a Vampire Hunting Kit
Buy a Movie Projector
Buy a Sun Clock
Buy a Maffler Man
Sell 5 items from Lizzie Davis' crawl space
End a day with Patrick Merman in a green mood
Buy a Bigfoot Photo
Collect 40 keys to unlock Unlimited Hidden Object Mode
Maintain the leader position for 7 days
Buy CJ Baxter's safe
Reach the Number 1 Rank!
Buy and sell 20 items from the Hot Category
Make a profit 5 days in a row
Auction 20 items for a profit
End a day with two or more characters liking you (in green)
Complete a hidden object scene in under a minute
Make a 300% profit in an auction
Change a character's mood to green in one transaction
Complete 5 unique hidden object scenes
Combine two items to create something new
Buy an item at less than 75% of the asking price
Buy and sell an item from the Hot Category
Restore an item
Restore all items before they are sold
Explore every scene, hidden object game, and close up in the first 6 location
Buy a group of items at less than 65% of the asking price
Bring an owner's mood from angry (red) to happy (green) in one day