I have a DKB Megachip for sale which gives you 2MB of chip ram. This unit works great and was just pulled from a 2500 I am parting out. This is for NTSC machines. This does have the 8375 Agnus installed.
I don't have the manual but it can be found
HERE in English. I would recommend looking it over before installing this in your system as there is a wire that needs to be attached to the 68000 CPU or the Gary chip.
Asking $75.00 including shipping to lower 48 or $10.00 more to rest of world. Please note this is the NTSC version so make sure your system will work with it.
