For settei set, is there only -ONE- original 
settei set available in the studio?

How about photocopies of the settei originals, 
how many pieces of such exist for a series?

I have been seeing Fushigi Yuugi settei sets, it 
seems that whenever one copy sold out, there's 
always another one waiting for its buyer. So, did 
they (sellers) do the photocopies themselves and 
distribute it?

It's been something that's been bothering me for 
quite some time.

Is there any way that I can tell if they made it 
themselves??