If I were listing a player piano for sale I would want to mention
the following:

1.  The make and style of the piano -- a Steinway art-case upright
would draw much more attention than an Aeolian no-name straight
alligatored-finish mahogany case piano.

2.  The year was it made; if not known, serial number of the piano.

3.  When it was restored, who restored it, what work was done.
If you don't know this, at least describe the work: nylon cloth,
cotton pneumatic cloth, white glue or hide glue.

4.  Problems known about it.

5.  An accurate count and listing of the rolls would be nice:
40 classical Duo-Art rolls, 100 popular, 60 QRS, etc.

From the way you described the problem, it sounds like your tracking
mechanism isn't working very well; you might need to adjust this.

A piano should always be in tune, whether or not you're selling it.
eBay is a good place to start, as is the MMD.  Joyce Brite has a web
site listing mechanical musical instrument for sale:
http://mmd.foxtail.com/Exchange/

Coming up with a value for the piano depends on how well it plays
and what make it is.

Eliyahu Shahar