selling the old RAS...
You are not likely to get much for it and if you put a decent blade on it that's money gone. If you have a use for it then I'd keep it. Mine is often used as a table temporarily anyway, so you could look at it that way. It's the best way to crosscut long boards unless you have a chop or miter saw on a stand with extensions.... another space grabber.
If you are wary about selling it on CL then I understand that also. It would be best to leave it outside covered up until the buyer shows up.
.... if there are any these days for the old RAS in your area. Check out CL before posting and see if the market is flooded with them. I know there are many for sale here.
The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)