Jason, dont be afraid of that E-tec, sure, right now a lot of parts are hard to find for them and will continue to get worse as time goes by but that motor is a good one if it has had any kind of care.
The E-Tecs above a hundred horses were trouble prone and you wanted to avoid those.
As far as any value, because of the issues with the larger motors there is still bad juju surrounding any of the E-tec line and you might end up giving it away, but if it starts and runs good and no noises from the motor or lower unit, run it till it quits if it ever does.
Couple of tips, run a high quality two stroke oil in it, non oxy gas, and it wont hurt to run a high quality injector cleaner through it once in a while.