These are the shop restock times. I use this list for my personal use but anyone else can use it too.

6/1 (minute it restocks on)
appliances
charity
chocolates
costumes
dvds
female shoes
glowing eggs
gourmet meat
minipet food
minipets
pearls
school supplies
seeds


7/2 (minute it restocks on)
bakery
candy
charity shop
giant vegitables
halloween treats
pizza
soft drinks
wallpaper

8/3 (minute it restocks on)
balloons
books
canned food
car parts
fruit
furniture
hair dye
ice cream
potions
voodoo dolls


9/4 (minute it restocks on)
appliances
cd's
charms
cooking ingredients
female clothing
fast food
flooring
furniture
giant fruits
magic
stamps
toys
trading cards

00/05 (minute it restocks on)
computers
contacts
flooring
flowers
frozen food
instruments
male clothing
pots of paint