new guage cluster

hello. i was going to get a replacement gauge cluster from Ebay but i had a question about it before i go ahead and pay. i was wondering what will happen to my odometer when i switch them. the one on Ebay has 86,XXX miles and mine has 114XXX. so what will it read when i put it in my car? will it read my actual mileage or the Ebay one, or will it just not show anything and think that i tampered with it?

it should read your actual miles as its stored in the pcm/bcm.