WHats it worth, got 40k orig miles 283, not ss just malibu. All stock nothing changed, even original seat covers.

please can someone take a guess for me

Need more info. Pics will get you a better answer. Rusted? Driveable? Really only 40k miles?

no exterior rust, only rust was in window channel where water had sat. im 3rd owner of car only things not orig is carpet, distibuter cap and spark plugs. I gave new paint and new carpet everything else is stock and orig

2 door? 4 door? automatic? other options? color?

I think those all impact the value. I know it did for me when I was looking for my 64.