Hello Peter and welcome, You need a 10" dob, nothing else will do !!!!
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. just kidding of course, there are many very nice and cheap refractors that will give hours of enjoyment,
looking back through the classifieds here, long focus Vixens with mounts have sold very cheaply.
They come up every now and then so patience will be the key.
Here is an example of a great little scope that sold recently:
http://www.iceinspace.com.au/forum/s...ighlight=vixen