In 2006 I bought 2 Eames molded plastic armchairs (Eiffel-design base).
Went to the Herman Miller site to see how much they sell new: $459.00 ( screen-shot attached )
I'm thinking about selling them and wondering how much these chairs depreciate. I am more used to selling electronics, like digital DSLR cameras when I buy a new model, and for those I normally ask about half of what they sell new. but not sure how this would apply for original Herman Miller chairs like these. I have the certificates too.
Any leads appreciated, thanks! 
jwolff,
I suggest searching for your chair(s) on eBay under the advanced setting to determine a price the chair(s) actually "sold" for not the current listings showing a price that is "desired".
The Basic Rules state "This forum is not a free valuation service" and hence this is the best I have to offer. Failure to read "last line on sign" may sometimes have a negative effect.
Try some independent "homework" and arrive at the facts for yourself. This is my best attempt to be "gentle and kind".
The definition of a fair price varies widely
e.g. there are different prices for wholesale level, consumer price resale level, trade in, little city vs. big city scale prices, etc.
Drive it off the lot and the MSRP means very little, unless you have an angle into that market.
Negotiation can be beautiful
Hello @niceguy, didn't know of that ebay feature, thanks for that tip, very useful.
Thanks @objectworship for your response.
Ooh and to the site, sorry! I don't expect to get an appraisal.. sorry for for walking this thin line.
Have a great day everyone.
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