Edelbrock CH4B

I got this intake along with a pile of other parts recently and I am not sure if I would like to sell yet but I was wondering what you thought a fair market price was. The only one I found on ebay was there for about $500 a couple weeks ago, and now the listing isn't up so I am assuming it sold at that price. Is that correct?
I've done a little research on this and to my understanding it is now discontinued, and only meant for a 440? Would it work on a 383?
This one appears to be completely new, never mounted to me. All dirty spots are from my dirty hands. It does appear to have some cracks/possibly filled in areas of the casting but nothing seems to be structurally flawed. All these (3) areas are pictured
I would just want a little info to have a better understanding of what I have, and possible market value
Thank you

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