Should I fix my '95 talon tsi awd first, or just sell it as is to get most $ for it?

well the idle problem is a unmetered leak in the intake. when you replaced the seal you must not have done that got of a job, you have to use silicone with the gaskets. and i would fix it myself and then sell it for as much as i could, put new bushings and other selected parts you may need, you will save a ton on labor and you can put that into it to get more out.