To finish what I have already.
Now does finished mean great to ride, period correct, catalogue correct, highly spec'ed, best looking..........etc?
To sell a few, I have too many bikes that perform the same function. Maybe then, add a drop roadie or a CX bike.
To ride and wear them out and only replace parts that fail or don't work correctly, whatever the spec. My old Mongoose with Acera never missed a beat.