For a hair studio, 550$ is a pretty good price for all the works, fitting, training, etc.
When I was in Toronto last, I was quoted 1000$ plus taxes and that didnt even include the supplies, needless to say I never went there again.
In my hometown of Windsor Canada, I was quoted 2250$ for a hair piece and a years worth of maintenance, so that was even worse lol.
Most hair studios price gouge you because they know they can get away with it,if you dont have the knowledge of the internet in your hands, luckily you do though.
For your first hair system, I would only suggest that you go to the hair studio first and get the specifics right (template, style, length, color etc.) of your hair system and then if everything is good about your hair system you can get it duplicated cheaper on the internet in the future. I suggest you get used to hair wearing and weigh the pros and cons of your hair system, that way, when you order on the internet, you will have a better idea of what specifics you want for your hair system and best yet you will get the hair system at a much reasonable price, the average price on the internet is a little over 300$ canadian plus supplies(glue,tape, hair system remover, adjust a bond etc.)
If the hair studio that you went to is reputable, they will get the specifics right the first time and it will save you the hassle of getting all the specifics right the first time out. When you first get a hair system there is a learning curve you have to go through, but in time, its as easy as riding a bike.
For future use, try either toplace.com, coolpiece.com or finalhair.com, they have reasonable rates for hair pieces. Im sure theres more, just search the forums on here and you will surely find more internet places to order hair systems from. Let me know how everything goes!