E body 8 3/4 value

It's not worth as much as a A body housing in my opinion. Most of the E body's came with an 8 3/4 so they seem to be more of them around. I often see them for sale. As far as what it's worth it depends on the demand in you're area. I so thing you did good on you're purchase though
Yes, I figure that I should be able to sell the 489 center section for at least $100.