JBoyle wrote:I'd really appreciate any guesses to their current values.
I'll say the same thing that I said earlier in this thread. Any item is only worth what someone is willing to pay for it. There can be wide variances in prices. Auctions tend to bring more money than private sales or Ebay most of the time. I will quote you what each of your autographs are worth according to the bible of signature prices, the 7th edition of the "Sanders Autograph guide":
JBoyle wrote:ZeamerB17 wrote: Does anyone have a signed copy of "Spirit of St. Louis" by Charles Lindbergh?
Yes. A special "presentation edition" #718. I (probably over) paid for it in the mid-1990s.
Sanders guide - $ 750 to 1500. I have been following the pricing of signed Lindbergh books on Ebay for about the past year. Currently there is a signed copy of "Spirit of St. Louis" for sale on Ebay for $4000. That is way, way too expensive and will never sell. Over the past year, I've seen signed copies of that book, as well as "We", by Lindbergh, sell for anywhere from $1800 to about $ 2200. That still seems to be a little high according to what it should sell for. Condition of the book plays a large role also, as I saw one in mint condition sell on Ebay last year for around $ 3000.
ZeamerB17 wrote:JBoyle wrote:Those are my Holy Grails, also something signed by Wilbur and Orville;
Yes, but only signed by Orville. A copy of Kelly's Biography. In the end flap there is a hand written account how it's first ownewr got the book signed. He was a flight surgeon at Wright Field and he wentto the Wrighgt home on Dec. 27, 1943. I found it at a used book sale in Dayton in the mid 90s, it was being sold by a dealer in Michigan.
Sanders guide - $466 to $1213
ZeamerB17 wrote:JBoyle wrote:Gentile and Godfrey;
Yes, but only signed by Gentile, a copy of his little known 55-page book "One Man Air Force" co-written by Ira Wolfert. I found it in a used book store in Dayton. I pais $150 for it and I authenticated the signature at the USAF Museum (as it was then called).
This one is hard to estimate as there is no listing in the Sanders guide for Gentile. I have seen signed letters and documents of Gentile's being offered for sale upwards of $5000 by an aviation art gallery, but I think that price is way, way over-inflated. I would guess that his value might be similar to either Bong or O'Hare. Here is the value of those two:
Bong - $1175
O'Hare - $350
Gentile is not as well known as either Bong or O'Hare, so that would certainly have to be taken into account as to the value of his autograph.
JBoyle wrote:Other nice pieces...an autographed copy (in a very shakey hand as might be expected) of Jimmy Doolittle's autobiography,
Unfortunately, Doolittle's signature is rather common as he signed thousands and thousands of books, art prints, photographs and documents. The Sanders guide does not list a price for a book but I would guess it would be somewhere between a straight, plain autograph and a signed photo. Here are the respective prices for those: $68 to $192. If you want to collect Doolittle's signature - get an early signature - something signed prior to the 1960's. Back then, his signature was much more stable, solid and is more rare. Later in life, particularly after about the 1980's, his signature became very tentative and was characterized by a shakey signature as you pointed out. Anecdotally, I can tell you that based on what I have seen off of Ebay, that book would have no problem selling for about the $ 200 to $ 300 range on Ebay.
JBoyle wrote:and a signed print of him taking off from the Hornet (signed by both the artist and Doolittle).
That depends on too many factors to evaluate including which print it is, who is the artist, numbered edition, etc. I have the Robert Taylor one he signed plus the other Raiders. I bought that a long time ago when it was cheap, but now it might go for in excess of $2000. For any of the lesser known aviation artists, it obviously would go for less, but I wouldn't expect them to go for any less than $ 400 to $ 500.
JBoyle wrote:And a copy of the Dec 1969 National Geographic, Apollo 11 issue, signed by Neil Armstrong.
The Sanders guide quotes a value of $ 849 for just a straight, plain signature on paper. Two things make that item special:
1) It was signed on the Apollo11 issue. Anything that is signed on a magazine, or photo directly related to the signer will have more value.
2) Neil Armstrong quit signing autographs many years ago. Unless you are his closest, personal friend, he will unlikely ever sign another Dec '69 National Geographic magazine. That makes it very rare.
Because of these two factors, I could easily see that issue going for double the value or $ 1698.
Armstrong's autograph is very popular now, particularly at auction sites, such as RR auctions, etc. I've seen Armstrong signed items easily go for over twice the Sander's guide values.
Like anything that is rare, historical or unique, it's impossible to establish a definitive value on autographs, but only establish a range based off of what other similar items have sold for in the past.
Hope this gives you a little insight into the value of your items.

Nice little collection, BTW!