Parkes book: I found more than two dozen available, ranging from USD $100 to over $200. Expensive, but not that rare...
Preston book: Found five copies ranging from USD $71-90...
Reilly/Scheina book--could not locate, Amazon or otherwise....
I think only original copies of Jane's Fighting Ships carry great value, mostly because of what they are, not the information within. I will say that the best part of those classic volumes, for me at least, were the pages and pages of adverts in front. Those ads for Parsons, Tannoy, Callender's, Harland & Wolff, and countless others, I enjoyed more than the sketchy and inaccurate data.
Jane's Reprints? I haven't found a decent reprint--at least none I would want to buy...they're just not the same as the genuine article!
On the whole, it would depend on how much you paid for all the books you listed, but I should think you have something to gain---especially if the market for these books opens up.
