I am having transmission issue in my 2008 Acura TL(110k miles). I took it to Acura dealer and they told me replace with a new transmission which may cost around $5000. I then took it to another mechanic which quoted $1800 for installing a used transmission($1000 for used transmission and fluids and $800 for labor cost). Now I am confused which way to go. $5000 is too high based on the return value of my car but then I don't know if $800 is right amount for labor cost which the other mechanic quoted me. Which way should I go and is $1800 right amount for a used transmission installation?