VERY basic job, just too busy to do it myself.
Need a postage calculator, that will spit out a postage cost when a post code is put in. The postage cost will be calculated based on the greater of: dimensional weight (LxWxH*250) or dead weight (kg). The cost will be a nominal flagfall + per kg charge. Both the flagfall and per kg charge will be different for every postcode. This will be adjusted for a fuel surcharge and GST after that.
This must be hosted on my webspace, which I will then input into my eBay listings.