Re: [OM] 180/2.8

[John A. Lind]

At 23:01 3/17/02, you wrote:
> C.H.,
>
> Thanks for the advise.  I now need to know what a "good" price or range of
> "good prices".  There doesn't seem to be much of a guide, not even on the
> bay.
>
> Cheers!
>
> Mauler...
Check out Skip Williams' eBay historical files on Zuiko lenses:
  http://www.skipwilliams.com/olympus/zuiko_ebay_history.htm

This page shows the *average* (mean) with some links to the data at the top 
that show the high-low range and standard deviation.  For this particular 
lens (180/2.8) it shows:
Sample size:  38 auctions (enough for statistical significance)
Mean:  $469
Low:   $215
High:  $800
Std Dev:  $113

The Std Deviation implies that (presumes the data resembles a normal 
distribution about the mean):
  ~68losed between $356 - $582
  ~75losed between $288 - $650
  ~90losed between $277 - $661
  ~95losed between $248 - $690

Criteria that rationally affect closing:
 * Condition of lens
 * MC or SC
 * How well the auction is written
 * Reputation of seller (with selling camera gear on eB*y)
 * State of economy (demand level for used camera lenses)
 * Business cycle (time of year can affect demand for camera gear)

Criteria that irrationally affect closing:
  * Loonies (requires at least two)
  * Perception it's the last lens on the face of the earth
  * Winning an auction is more important than lens, how much it's really
    worth, or damage to bank account (or credit card debt).

-- John


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