405th.com and it's forums do not sell armor or props. It is a violation of intellectual property rights of the respective copyright owners and you will find yourself in a lawsuit and/or with a c&d order so fast it will make your head spin.
If you're asking a question of how much we spend on supplies that's an entirely different question - sorry if I'm mistaking this for a sale post. Either way this needs to be in the noob forum since you only have 5 posts.
As for my answer, depending on the suit and quality I've spent up to $3000 on some full body props and as low as a few hundred dollars.
Cheers,
Kensai