Ok so i was reading around the other day and from what i found that since i bought My Grand Prix GT for 2k with 150k miles I wanted to find a GTP engine with way less miles that i could drop in, in place of the GT one. But after doing some research i was getting from some people that it was either a good idea or a bad idea for value of the car. As in some said it would cut the re-sale value to half of the original, but some said the opposite that if the engine had few enough miles it could double the re-sale value of my car...so yea I'm really at a loss of which would be better..mainly because 150k miles is quiet a lot, but if i chop the value in half then...>.< idk what to do..Help? (btw wasn't sure where to post this)