I would say that this appears to be very valuable.
Here is the only book I found on ABE by Rockland Bookman in Orchard Park, NY (listed at $500):
"Henry Harriman, London, 1668. 254pp. 16mo. Third edition. Boyle, one of the most remarkable scientists ever produced in England, uses his talents to analyze the style of scripture. Boyle compares the gospels in a truly scientific fashion commenting on their essential harmony. A natural philosopher, Boyle saw complete consistency between religion and science. Full morocco, rebacked"
This is a third edition. If yours is a first and has the original binding, it's likely to be worth much more than $500.
You might correspond with Rockland Bookman - they are members of abaa.org where you can probably get an e-mail or address.
