Hardly an expert here, but I have one I inherited from a WW2 combat vet uncle. It was converted to use the more plentiful .45acp as noted by many here. I check prices from time to time. Sounds like an interesting price.
Gunsinternational has a couple. I’d check serial numbers and the date should be on it.
http://www.gunsinternational.com/Webley-Revolvers.cfm?cat_id=120
Looking at mine right now...date on frame above cylinder. Serial number under the frame, front of trigger guard and on cylinder right where it was shaved. FWIW.