As far as I know, the newest 2000 motherboard is still TA-090 which if I remember correctly were hackable, so the newest 2000s should be hackable, but not the slightly older ones (TA-088v3). I haven't really paid that much attention to the whole motherboard thing recently except for when I got a PSP (TA-088v3 were the newest at that time, luckily I didn't get one), but I've picked up a few tidbits more recently. Of course the safest way is to just buy one you know is old enough to be hackable.