BTW, I don't collect FY, it's just an example ^^

Yes, you have to pay whateverthe seller asks. My 
point is, whatever the seller asks is directly 
related to the market, and who determines the 
market? The consumers. You said it yourself,

" If the price is too high, no one will buy 
it, and the seller will be forced to lower their 
price."

Exactly.

Everythign that happens in the cel market is 
directlyr eated to us. My point is it's our 
responsibility as sellers, if we don't want to 
screw ourselves over in the long wrong and have 
to pay massive prices for our cels, to not be too 
greedy about things. Use judgement. I'm sure a 
few of the prices on your Ryouko cels have helped 
boost the prices on an expensive market for her 
which you already pay large amounts...why would 
you want to do that to yurself more?

-Misha