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Thanks! Today there's one on the market at the 150 pound level, which provides a handy reference point:
(1758). SHARP, Samuel. A TREATISE ON THE OPERATIONS OF SURGERY, WITH A DESCRIPTION AND REPRESENTATION OF THE INSTRUMENTS USED IN PERFORMING THEM: TO WHICH IS PREFIX'D AN INTRODUCTION ON THE NATURE AND TREATMENT OF WOUNDS, ABSCESSES, AND ULCERS. London: Printed for J. and R. Tonson, 1758. 7th edition.
Again, thank you and please let me know if I may be of further help with this question.