Hi Ben,
the CG-5 mount from Celestron belongs to the category of equatorial mounts and is in itīs payload capacity and tracking accuarcy similar to other EQ5-type mounts (Skywatcher EQ5 i.e.).
One dealer in Australia sells the basic EQ5 without motors for just under 600AUD (Bintel) I havenīt looked up other pages but Andrews might have the same for a similar/better price.
Motors will cost you probably around 200-300 AUD; so alltogether you save around 500AUD compared to a GOTO mount of the same capacity class like the Skywatcher HEQ5 (in the USA itīs called Orion Sirius I think). But this one offers an autoguider port and GOTO functionality. So if you start thinking about getting into astrophotography, it will pay to invest the 500 extra now rather than byuing a new mount altogether.
The C6 on a GOTO upgraded CG-5 is available at Andrews for 1760AUD but I am not sure about the autoguider port availability on that mount.
PS:On a personal note I would not recomend an EQ mount if you mainly use the scope from you backyard and this backyard has blocked view to the south celestial pole. As all EQ mounts require you to align them with this point in the sky - otherwise they are pretty much useless. A Dobson-type mounted Newtonian telescope doesnīt require any aligning, offers much more light gathering power for the money (12" scope=900AUD) and will probably be used more often as the preparation time is much shorter. Both types need some time to cool down to ambient, and both scopes have to be mated to the mount. but the eq-version requires also power to the mount, leveling and pol-align.
PPS: 6" is the entry-entry size --->Aperture rules!
Cheers
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