Always a tricky question, and no absolute answer, I guess.
Having said that, and depending on rarity in your particulat area, I should have thought this was the highest that you would ever expect to pay.

I would want such a 3000 at that price to be the earlier curvy style, in mint condition, and perhaps to have some unusual keys and so on.

This is not that uncommon a machine, though a very good one, of course, and uness you fall in love with it when you go to view, I would be patient and look for a cheaper example, or make an offer.
 

Last edited by beak (06-9-2014 18:38:07)

First off, where are you located (it's an extremely important point)? And which year was this Hermes 3000 made? The 3000 was manufactured between 1958 and 1976 and went through three generations of case design.

In my area (Toronto) there are plenty of 3000 models around and people typically ask a ridiculous amount for them because they look exotic. I would never pay more than $100 for a first generation model - and even then it had better be in pristine condition. I think I paid around $40 for my 1962 model (see below), and $20 for my 1970 3000.



 

I think the ebay sold listings are a good indicator of pricing. Be sure to search only Sold listings, instead of Completed so you know what prices were actually paid. First versions sell for the most, but several have sold lately for less than $100 US, although some have sold as high $350 US including shipping. Second and third versions normally sell for less than $100 US.

Sounds like the seller is asking the high end, especially if there is no manual and the case is damaged.