I am new to Massdrop. I see 4 chairs that, depending on price, I would be interested in one of them. But they all have a button called "requested". I was just viewing this one and it states it was available last year. So that means what? why did they list it on the site if they don't have it available? or is it that once enough people click "requested", then they will offer it again? Where can I find just a list of things available right now? Or can you only buy stuff that you have "requested"?