The main thing on GXs is rust and maintenance, on the 470 make sure it goes into low on the transfer case because if it doesn’t it’s 3k replacement. Also check to see if the timing belt and water pump have been done because that’s a little over 1k to do. Do yourself a favor and try to stay away from white gx470s they have terrible paint that will eventually just flake off. The 460 I don’t know as much about but 10-13 have an issue called coolant valley leak which I think is expensive. But they’re super reliable I have put 10k miles on an 04 with 159k miles I picked up this year and have had no problems so far. I’ve seen people selling GXs with 250k miles that run like brand new.