Peter, please look at Australian Telescopes prices or go to Astro Pete's webpage, these are the two cheapest suppliers in the country (around $160 and I don't work for either company just had good dealings with both, although Australian Telescopes are slow to deliver) or keep looking at IIS classifieds. Cloudy Nights forum classifieds is a great source as well. I picked up a used 13mm Orion Stratus for $80 delivered to Australia. I think there is a 5mm Hyperion in the IIS classifieds that you might be able to haggle for
http://www.australiatelescopes.com.a...eyepieces.html
http://www.astropetes.com.au/accessories.html