Stephen, a great idea to check all options.
The reason for my comments was I had a drink recently with a girl who used to work for the PR company who worked for Ebay, she said the number one job was to promote Ebay followed very closely by reassuring people Ebay was safe as there was so many bad news stories about Ebay. She acknowledged there are thousands of complaints and scams every week, which just to be clear, is only a small proportion of sales, but these are real problems and real scams.
Her job was to present Ebay as a safe brand like Myers or David Jones, but in many cases it is no safer than buying from a garage sale. In fact it is less safe than a garage sale, as with a garage sale you know where the individual lives, whilst many hide behind the anonymity of Ebay. Most would laugh if we found out someone purchased their D200 at a garage sale, but in fact it is safer than Ebay!
These are complex electronic devices which are likely to need service. Many cameras here have had needed a repair of some sort. Just to give you an idea, I will start a poll. The problem with Ebay feedback is that it is at the point of arrival, not after one year of supposed warranty. So all it really says is that the item arrived, not how the individual dealt with any warranty problems, say nine months after the sale. Personally, a guy who has any problems just delivering the gear is not someone I want to be dealing with on a warranty problem 50 weeks after he has banked the money.
Sorry for all the information, but in the case of an expensive electronic purchase it is better to be forewarned.