...you bought something from Ebay that was technically ok (well, until I open it up I think it is...) and what was advertised but...

When you look at the picture on the auction closely there are some subtle differences between the item in your hand vs the picture (which probably looks a bit better in quality) and you paid $22US for postage, but it turns up with $13US on the box for postage!

Yes.

ebay's got a "good value for shipping" feedback button; I'm sure you'll fill it in appropriately

Charging more than postage for shipping is a common eBay practice.
The logic is that it's shipping AND handling.
I just learned to add things up before I see the paypal invoice.

Two words
Bad feedback.

Trade Me only allows you to charge postage and packaging. Not handling

yes, that is true. What about the posting of what is a different picture to the product - it wasn't a stock shot from the manufacturer, and I knew it was used, but it was certainly shinier and had a metal adjustment knob, rather than a plastic one like I have.

I assume you are talking about your G250.
If it is any consolation the plastic knob versions are newer.

I just paid $22 for shiping on a reg from the states too.

not alot you can do about it really, being an offshore auction site, you just gotta lump it now, unless, he is a decent seller and and replaces it, but other than that bad feed back does squat... alot of those sellers have multiple accounts anyhow

Yes, i'd be pissed off too.