Lets do some simple math here.
First off, we will forget the fact your odometer is already 10% off from the factory, which means my numbers will be even larger than the average person simply making the change.
After a sprocket change, lets say it is 15% off. So for every 100 miles you go, your odometer gains 15miles. For 1000 miles, that is 150 miles. 5000 miles that is 750 miles. For 10,000 miles that is 1500 miles added that werent there.
Do you think at any one of those mile points the mileage added negatively effects the bikes value by any significant amount?
Would you buy a 3000mi bike for a given price, but pass on a 3750mi bike for the same price?
How about a 10kmi bike vs an 11.5k bike?
Nope. Not me
It is negligible in that sense.
take out the initial ten percent you have stock anyway, and those numbers get WAY smaller. 5%.
At 10k miles you get 500 miles off due to the 5% added by the sprockets as compared to the average stock bike.