Goldfish really don’t cost a lot of money at all, it’s all the other tank requirements that can add up and put a hole in your wallet. If your really wondering how much are goldfish you can get them for less then a $1 at pretty much any local pet store.
I know where I live you can buy goldfish for usually $0.99 on a regular basis. Sometimes if you shop around you may be able to get specials on goldfish if you buy 6 or more. The cost of the goldfish is the least of your worries. Let’s face it, goldfish are cheap!
What a person needs to know are the costs of all the aquarium equipment you need in order to know how to take care of goldfish. Wherever you decide to buy your goldfish they will be able to show you everything you need when having a pet goldfish. 
If your looking at owning fancy goldfish then this will cost you more money. Whether your looking at having black moors, calico fantails, bubble eye goldfish, sarassa fantails they will all vary in price. Most people often start off with just regular goldfish until they get use to owning an aquarium or pond then they invest into more expensive varieties of goldfish. Buy some cheap goldfish at first then move on as your experience increases in the hobby. How much does a goldfish cost depends on you and what type or variety of goldfish you want.
Sincerely,
Jamie Boyle
The Goldfish Guy
“Helping Goldfish Owners With Advice, Fish Care and Fish Medication Treatments for Goldfish Diseases, Illnesses and Parasites”