Lovely sculpting, I do not wish to criticise or diminish the figure in any way. I agree totally with the comments already made on the quality of the work, but the mix of Sengoku Jidai and (presumably) Edo period items, in an action pose would put me off buying a similar commercial piece unless it was obviously presented as a fantasy piece (i.e fighting against oni, etc).
Armours from the Edo period onward were predominantly manufactured as "art - works", intended for show, and to display the skill of otherwise redundant armourers. Had this piece been presented in a static pose I could accept it as representing a samurai dressed for a ceremonial parade or event but I doubt armour such as this would have seen any serious action. The Sode in particular seems to abandon the conventional laced plate construction almost universally used by Japanese armourers to facilitate movement.
The use of horse armour in action is also an old well worn chesnut. I know it is shown in some early painted screens and artworks but a number of books I have read disagree widely on whether this is historical record or artistic romantisicsm. I have never been able to establish a consensus of opinion on the subject.
Toyotomi Hideyoshi is commonly depicted using horse armour (Pegaso and Andreas in model form), and he, as well as other high ranking Samurai undoubtedly owned it, but I can only hope someone out there can specify definitive, period written, reference to it being used in battle during the Sengoku Jidai period itself.