¿Where do I buy old and rare ayu items?

[yagovg]

I became an ayu fan in february, and since then, I bought some things like singles and albums, but the point is that if you want to buy something old like her 3 inch singles you have to sell your liver to buy it, or they are out of stock which is even worse.
My question is, those fans that now want to buy her old stuff, can we find it somewhere, is there a web or a good way to obtain them?
I want her "TO BE" 3 inch single so bad, and "evolution" too. I tried to find some first press (of her actual stuff) but it is no use, it's all out, i wanted to have the "guilty" album cd+dvd with the photobook japan version, but it's sold out.

Can anyone help me? or we, the new fans, have to accept we cannot have her old and rare stuff?