Late 1970s - all gas range. This is unusual in that the grill (Broiler) was set into the top and had to be raised to use. It has a rotisserie too, and the price is certainly right
And the price of this is certainly NOT right - £50 and a reserve - I will not be holding my breath waiting for this to sell. That said, it is 1975 or around that time and these single oven versions are much less common than the double