Sounds about like the second on this list...
http://www.abebooks.co.uk/servlet/SearchResults?bi=0&bx=off&ds=30&sortby=1&sts=t&tn=Seventeen+Years+Among+the+Sea+Dyaks+of+Borneo&x=96&y=6
...but I'd add £50 or so for the 'signed' factor, considering that the author is unlikely to be signing any more.
If the clergyman involved had any standing you could add even more.
As for is eBay the place? Well, not at the ABE price. Pick a number you'd be happy to accept and go with that as the start price. Depending on what it had cost me I think I'd probably go for a 99.99 start and hope for a few bids.
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------------------------------------------------------------------------------------------------------------------------------------------------------Whomever you may murder, there's no police like Holmes.
Σ Ψ Δ
σ ψ δ
------------------------------------------------------------------------------------------------------------------------------------------------------Whomever you may murder, there's no police like Holmes.
Σ Ψ Δ
σ ψ δ