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HI Robert,
itīs aperture what you want when you are looking into the night sky, especially when you have a lot light polution like Auckland has. The entry level for an amateur scope is 6" (150mm), the scope on your link has 3.5" (max. magnification is 180x, limiting magnitude around 12Mag) and the mount is alt/azimut, so you get field rotation.
Donīt worry about wearing glasses, all telescopes have a focuser that allows you to get sharp images without wearing glasses (the scope is your glass). If you want to leave your glasses on, buy eyepieces with long eye relief (like the Televue Radianīs).
Be careful with second hand, not everybody tells you that he cleaned his mirror with the green side of the sponge...
Cheers
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