This was the answer. I was searching in the default range and the values were actually in the 0x83000000 - 0x84000000 range (8 bit for coins, 32 bit for beli for anyone wondering). Thanks for the help!
I've been having trouble with one piece: Pirate warriors 3. Searching for money or coins I manage to come up with one record but changing its value does nothing. I tried this with 8, 16 and 32 bits with no success. Can anyone give any tips?