Warrilow will price as Brand Value level three (BV3 - most Brit maker's name's). The gun appears to be a second grade BLE which makes it Original Quality grade six (OQ6 - plain SLNE, 2nd grade BLE, 1st grade BLNE). The Current Condition level is, after CJ's post, known to be not less than five (CC5 - well restored))
BV3-OQ6-CC5 = $1,336 for a 12 bore gun of 1890 ish to 1960 ish vintage at USA retail. 16 bore guns seem to currently get a premium of about 2X. So, a price of $2,650 at a major USA retailer for this gun would not seem unreasonable.
Does it fit you? Are the stock dimensions close enough for you to adapt or adjust? Does it handle to you liking, either for fun shooting or for serious shooting? Does it "feel" right in your hands? Do you truly enjoy the aesthetics - does it make you smile? Is the price within your range without straining the budget to where it will be "millstone" arond your neck?
CJ is very knowledgable and I'd expect light load, low pressure nitro 16's to be just fine.
