Looks like the seller is from Hong Kong. I recall there was a thread about someone enquiring about N900 sold from Hong Kong. That is just wrong that they charge you extra for stylus and A/V cables.

Unfortunately I have had a similar incident when I purchased my second N900 on my trip to Hong Kong (I visited Taiwan and China apart from Hong Kong and it seems like Hong Kong did stock N900). The seller did not provide me A/V cables, a non-genuine USB -> microUSB cable (which fails intermittently), and a useless wired headset (which doesn't work with N900). Not to mention that the N900 was used prior to my testing and purchase. I tried to dispute but they said that's what came with the device (which was utter nonsense) and said that if I wanted those `accessories' I will have to pay extra for it.

Anyhow I left the store disgruntled and decided to keep the used N900 along with whatever that was missing from the box.

Back to the topic, if you see the photo by the seller depicting the package contents, notice how the cables are sitting on top of a Nokia N95-1 box? not that it matters alot but its interesting to note that potentially the original box is probably missing for the said device. The headset provided in the photo is also a little weird with extra controls for music listening. That's not a genuine N900 included item as N900 is not capable of skipping music, etc by default (and there was a huge thread about it).

Also you should leave a negative feedback on the seller. I went through the seller's history and noticed there was one bad feedback (on the first page) for N900 sold to a person whom declared the accessories are not original.