Im not selling on here so please dont report me im just asking as I dont have a clue of the true value of Oasis and Music memorabilia

I own a signed cd in its case of the oasis masterplan album (has a couple of small cracks on the back of the case) but the cd is fine with no problems and the signatures all over the cd and case itself are perfectly clear with no marks near or around them – so how do you value music memorabilia in turth is it just what you can get or is there a way of valuing what you have?

interested as I know more about F1 memorabilia than music thats all

cheers, music fan