I recently tried to sell a really nice Jurgen Kreckel refurbished ercona I with a tessar and the 6x6 mask for what I thought was a reasonable $200 with no takers. I'm now thinking of listing my voigtlander perkeo w/ color skopar for the same reason: lack of use. Somewhat related, I'm often impressed with some of the photos I see from tessar folders posted online but mine are always so unimpressive. I stop down to around f8 when I can.
If you check the sold listings on ebay, you'll see Erconas going for less than US$100, or hardly much more.
Perkeos are fetching upwards of US$800.
As someone said, refurbishment means little to a buyer. Smart buyers know that if the refurbishment goes pearshaped, they're stuck with it. To get $200 for your Ercona, it's likely to need the leather case, the original box, and perhaps the user instructions accompanying the camera. These are what I look for myself if a high price is being asked for a camera.
For the last ten years, folders are all I've been buying, I love the antique value and the simple technology, and I particularly love exposing film in them regardless of quality.
We all have our favorite brands as well I imagine, mine are Kodak, Franka, Zeiss Ikon, and Wester. I have two Voigtlanders, a 6x9 with Vaskar lens, and a 35mm Vito (non folder), but they are all I want.
I was surprised at the prices paid for Perkeos in the sold listings. A Perkeo III with uncoupled rangefinder has the potential to break you bank account. What is it about these Perkeos? Are they cult cameras? It can't be just the Color Skopar lens, quite a few different cameras have that lens.
Is your Perkeo, a I, or II, or III? Prices paid for these range accordingly, from US$60 to US$800. Cosmetic condition usually matters as well when attempting to procure a higher than average price. A buyer can't really tell how the mechanicals are until it's in their hands, but the listing photos show cosmetics before deciding to purchase, and can influence the value to the buyer and/or how quickly the camera will sell.
With your Ercona, if it works well and you have faith in it, keep it listed and hope that it catches the eye of a Voigtlander lover who can't afford an Ercona II, or III. But you may have to extol all of it's virtues clearly to justify the higher than usual market price. If youv'e exposed film in it, show a couple of the best pics in the listing. That always helps. The alternatives are of course, lower the price, or simply hang on to the camera and try another time in the future.