What's an 8 3/4 A-Body Rear End Worth

Met a guy yesterday and started talking cars. Told him I was working on a Dart and needed a rear end. My current car has an 7 1/4 rear and will not hold up to the 6.1L Hemi I am going to drop into it.

He's got a friend who has a 8 3/4

Here's what I know for sure:

A-Body Width
very clean, no rust, no pitting
very complete drum to drum brake hardware looks good, brake lines and hardware look to be in good to excellent condition
Includes Super Stock Springs
Small Bolt pattern

Here's What he claims, met him seems credible.

3.23 Open diff
Recently rebuilt came out of a car that was hit in front of his house.

Wants 800.00 including springs.

The nice thing about the rear is that I could drop it in the car and get it going and add a sure grip and a better ratio later.

So let me know what you guys think.

Thanks,

Regards,

Joe Dokes