This is of course only your opinion. There are plenty of people who are rabidly into collecting vintage console systems and games (take a look through the Atariage.com forums). Given this item's age, and the fact that it is presumably boxed and complete, there are collectors out there who would love to add it to their collection. One man's trash is another man's treasure.
-S
Of course it is my opinion. I didn't present it as otherwise. However, doing a simple Google search of the current market value of an Odyssey simply contradicts the seller's price point. From here:
http://www.pong-story.com/odyssey.htm Odyssey information for the collector:
Because it is the first video game system, the Odyssey is quite sought after by collectors. Because of the large numbers produced, it is still easy to find one, especiallly in an auction web site like eBay. Although prices vary depending on the demand, the average price for a complete Odyssey console is $100. Anyone who wants to buy an Odyssey must be patient and not feel the need to buy the first unit offered. Extras like add-on games, carrying cases and rifle packs can add a significant value to the console itself. On the other hand, an incomplete system can sell for very little.
I'm not sure what postage is to the land of the Kiwi, but something tells me if he bought a set from the US he'd save money.
Look, I understand people collect all sorts of things. My mother collects spoons, my wife collects figurines, I collect arcade cabinets. But a serious look at the old electronics market shows that it really doesn't have anything other than a small, die-hard collector base and that old consumer electronic items are still pretty common, even thirty year old items. Folks reflexively don't want to throw out small items that they paid a considerable amount of money for when they can just store it somewhere and forget about it. A patient collector could probably pick up such an item for under 10$ US, if not free from someone who wants to give it a good home.
My point is that 250$ USD is far too much to pay for a thirty year old gaming console. Be patient and wait for a better deal.
APf