<blockquote cite="UmbertoAnastasia">if you buy more bulk isn't supposed to be cheaper than a single prices?</blockquote>

Yes that does work in real life, but as said by Ancalgon "MR players have no business sense"

People can sell, 50, 20, 10 or possibly even 5 at a higher price than the single cretit rate, beacuse other people are lazy! 2 buttons is alot for some people to click repetedly, so they would prefer to only have to do the transaction once. thats why if im selling 10 creds i put them higher than the single credit rate, and they do sell. I always buy at the lowest price.