Agree Rob. Broncos are definitely collectibles now, but you don't add a ton of value by having those items you mention. Sure, it's a very cool thing to find a fairly rare window sticker for a Bronco. But it's not the big value-adder that it might be on a more rare vehicle or a more sought after one.
The 51k miles should be able to be verified. Mine says 75k on the odo, but I know it's got 175k because I watched it turn over to all zeros myself. If you know that it's legit though, that's a very nice low mileage vehicle for sure.
But like many other aspects, the low mileage aspect is only worth good money if the vehicle is still in good shape. Which leads to the patina and the rust.
If the patina is extensive, that's just old paint that someone will want to paint over. If it's just light patina, you've got something worth saving as-is.
But I'm going to say that Bronco patina is a VERY find line between super cool and way too much to keep. Mine is actually right at the breaking point. It's really not much, but between it and the faded paint, new paint would have made it worth more.
The good points are sounding pretty good. But the rust, by the time it reaches the rockers and the tailgate means you're going to find it in a lot of other places as well I would think.
So I'm in the $5000 to $8000 range myself. With that said however, there's a '69 on eBay right now (Candy Red) with way too much patina, way too much work needed to be done, but almost zero rust (seriously, good pics to prove it) and it's already up to $11,000 the last time I looked.
So my $8000 might be a bit low for today's market.
Even though a typical EB commands more money at auctions these days than a garden-variety '69 Camaro or '65 Mustang, the "low mileage" and "original paperwork" things just don't carry the weight yet that they do with those marques.
Now, brand new shiny paint on the other hand... That still reels 'em in like pirahnas to meat!
Good luck with it.
Oh, and if you do have pics you can share, send them to either one of us and we can post them up for you. If you see the "contributor" beneath the name, we can do it. My e-mail is
paulb@wildhorses4x4.com and I think I can accept pics through that address. If not, I'll give you another one to try.
Thanks!
Paul