Pyrotechnic Supplies

Ball mill: Grinding things much fine than possible by hand. A pic of my ball mill is below. You can just use a rock tumbler as one. That's what mine is.
Cost: about $20, to over $1000

Fuse: This is kind of a given in pyrotechnics. It lights your various products. I personally always get waterproof fuse. After a while, un-waterproofed fuse tends to crap out on me. I think the KNO₃ in the BP absorbs water. It's commonly called Visco, or cannon fuse. There are several types of fuse. Visco is the most common. You may also need time fuse if making arial shells. Theres also blasting fuse.
Cost: Anywhere from $.05 to more than $2.00 a foot.

Scale: Used to weigh things. You can get one for about $20 or $30 on ebay. I've been trying to get one, but been lazy. The postage spring scales won't work. Try a jewelry store, office supply store, head shop, chemistry supplier. All should have good quality scales. The chem suppliers could get a little pricy.
Cost: Depends

Scissors: Cuts paper, amongst other things. Enough said. Can't be used to cut fuse!!!!!!!
Cost: like $3.00.

Razor Blades: Used to cut fuse. Also cuts time fuse for priming. Can work nicely at cutting pressed BP into pieces
Cost: $.39 for a pack of 10

Tubes: Holds pyrotechnic/high energy composition. Yep, thats about it.
Cost: dependant on size

Gloves: Keeps you not poisoned. Keeps from staining your skin. Makes for less hand washing. Gives better grip. Plus they're just so darn fashionable.
Cost: Cheap

Dust mask: EXTREMELY IMPORTANT. Keeps a larger percentage of dust out of your nose an mouth. Without one you make blowout colored mucus. Will not function like a gas mask or respirator.
Cost: $.20 a piece

Tape: Holds thing together. Duct tape and electrical tape works quite well. Masking and scotch tape will work most of the time too. You have to love the metallic grey from duct tape though. Why use anything else?
Cost: $.39 a roll for duct tape, and you don't really need anything else

Hammer: Useful for ramming clay plugs. Also useful for venting anger. Can be used to ram compositions too. Rubber mallets, standard hammers, maul, sledge hammer. It all depends on the situation
Cost: A couple dollars to $25 or so

Ramrods: The name says it all. Its a rod thats used to ram stuff. Dowels, metal rods, professional lathed ones work wonders.
Cost: A couple cents(dowel or metal rod) to $50

Glue: Glues things together. Can be used as an end plug. Makes things air tight. Holds rolled tubes together.
Cost: a couple dollars at most

Screens: Separates things, mixes together better, breaks up lumps, corns things. Very versatile. I have 3 screens. Window screening, a larger mesh screen, and a screen used for coffee makers. Remember, window screening is free at construction sites. Its just as matter if its been used yet or not.
Cost: Free, do maybe a few dollars

Containers: Holds things. They can be used to collect things, do experimenting in, keep dry, a variety of things. Basically anything can be used. Paint cans, milk jugs, film canisters, beer cans, Pyrex flasks. Just save the containers from food
Cost: Free most of the time, unless its specialized

Clay: Can be used to plug things. Can be used as heat proof nozzles. Can make your own crucibles. Clay is pretty cheap. Cat litter works for most plugging purposes. Maybe have to grind it up for nozzles.
Cost: next to nothing

Calculator: Calculating things. Mainly used to find how much of chemical X to put in if not using exact procedures. Used to change ratios for different chemicals. Only a cheap one is necessary.
Cost: a couple dollars, to a lot.

Heat source: Melts things, Fuses things, chemically reacts things. Hot plates, heating mantles, ovens, furnace tubes, bunsen burners, oil baths, other baths, they all have their place and time.
Cost: Very cheap to well over $10,000 for some extremely high end things.

Camera: Used to document your work. Can also be used to share your adventures with others on the internet. Can be used to make visual aids like I have done on this page. Digital is almost essential for internet purposes.
Cost: This could put you back a bit. Check Ebay

Mortar and Pestle: Grinds small amounts of items. Useful when ball milling is not an option due to size. Good for grain size larger than fine powder.
Cost: $10 to $150

Kraft Paper: Roll your own tubes. Paper grocery bags are made from kraft paper. Heavier and cheaper than computer paper or other types of paper.
Cost: free(grocery store) to several hundred dollars a roll for the highest grade.

String: Holds things together while gluing. Hangs things up. Can be used to make black match, and cross match.
Cost: maybe $3 a roll

Brain: Self explanatory.
Cost: Priceless