Those Docters look good, but potential buyers should know that those have the old version eye pieces, that have very short eye relief (10mm against 18.5mm of the new ones), so most users should not be able to take the whole field of view or use it with glasses. Those are not also the ED version, so high contrast images such as the Moon against a black sky or the border of the mountains against the blue/white sky will present some residual color which is in fact more prominent at high magnifications...