Dog Stuff:
Toys - ($0.50-$2)
Bristle brush - (50 cents)
Extendable pet gate ($5)

Fish/Aquarium stuff:
Eclipse 3 gallon fish tank kit ($10) - (with cover, filter + 3 cartridges, gravel, decorations, fish food, tubing, light doesn't work)
Aquarium chemicals/medicine/food/salt (25 cents - $1 each or $5 for all)
Air pumps and other accessories (net, small gravel filter, tubing, breeder net, etc) ($1-2 each or $5 for all)

Links to other items for sale:
Furniture - http://sfbay.craigslist.org/pen/fuo/3968706594.html
Small electronics - http://sfbay.craigslist.org/pen/ele/3968701183.html
Household items/bedding - http://sfbay.craigslist.org/pen/hsh/3968713771.html
Women's Clothes/Shoes/Accessories - http://sfbay.craigslist.org/pen/clo/3968687102.html