I will be interested to hear what the car is like if you view it. Price is a little bit high, I would say, unless it is exceptional. Having said that, there are so few offered for sale in UK it is difficult to say what is a fair price. European prices at dealers can certainly be quite high. It will be a B16, one of the first PV544's. Should be 4 speed, although some of the first ones were 3 Speed.
A lot of 544's get snapped up by the classic rally brigade.
Enjoyed mine ever since buying it in 2014, and used it on DiD last weekend.
I bought privately, dealers are often clueless about rarer cars. have a look at the Volvotips website for detailed information about the model.