The EZ4 originally ceased production some years back, and got kind of rare (and thus expensive) at one point, which might be what you are referring to.They came back with a new batch of EZ4s. Then another to change them to microSD but stay GBA size, then another that got dubbed the EZFlash reform but was still mostly an EZ4. The older EZ4s also got an update at one point to allow them to patch games on the GBA side of things and not need EZ4client or anything any more (though you still have the trouble games http://gbatemp.net/threads/buying-a-gba-flash-cart-in-2013.341203/page-18#post-4756995 ).You can still find various ones of these in shops, though you might have to look for a little bit. I don't know where we are suggesting for Dutch sellers, or the surrounding countries, these days though. There were some decent ones at certain points but I have not kept up, nor seen any conversation, in a while.If you are using a DS then you could also use an EZFlash 3 in 1. Though you will probably only find the DS lite sized model these days (people bought up all the GBA sized ones to make repros with, and use for parts for certain electronics projects apparently).They then made a whole new standalone GBA flash cart called the EZFlash Omega, one aiming to be the be all and end all of GBA flash carts (and they are very nice, about the only thing that will match it in terms of features are the everdrive GBA carts which are quite a bit more expensive). Anyway this EZFlash Omega stuff is what this update is for.GBAtemp's review of the Omega