Originally Posted by
SkulFuk
There's actually a good reason for the 499 limit (500 since the set itself is counted).
It was brought in a while back because having bigger sets causes a multitude of problems that resulted in many sleepless nights... Literally, you have no idea how many times I wound up doing all nighters due to sets with 500+ items inside them.
So yeah, afraid it can't be raised.
*EDIT*
As a (related) side note - the same problem is also why there's a limit to how many things you can transfer at a time.
But would changing the item limit per set from 500( included itself) to 501(included itself) really create that much trouble ?