I am terrible at pricing myself. I always price too low and my wife says I give my stuff away too cheap.
Depending on what your going to include with this set(I seem to remember a pair of vambraces for some reason). The breastplate alone with the pauldrons and the tassets as pictured is worth at least $950 US minimum.
I have the same problem with low prices , my friend! Moreover, in our country not many people can pay an adequate money. So I plan to enter the international market But I don't know the needs of European and American consumers. As I understand it, few people need heavy armor for the full-contact. Most are interested in nice stylish image and shape.
In the US, we have a group called the SCA. They use both heavy leather armor and steel in blunt weapon full contact. They obviously require heavy less stylish armor and they are a large market. They still want some style but protection is their major concern.
Cosplayers and larpers are the other side of the coin where they go for stylized armor to suit their characters. Cosplay is big in the US and larping is starting to grow, though nothing like European larping , unfortunately.