be able to arrange terms whereby they can resell your
artwork, of course they will take a percentage.
The gallery will usually take more than 15% and
as high as 50% of the resale price, depending on how
difficult the artwork is to move. Be certain to negotiate
this upfront and in writing. An option to having the
gallery sell your art is to trade with them. If they happen to
work with the same artist you may be able to exchange
works at the current market value of your artwork. Should
the gallery have a work you want, this is a great way of
changing up your art collection without having to spend any
more money.
If you decide to work with a gallery for the resale of
your item be sure you receive in writing a statement
noting your item is there on consignment. This will
protect you from many headaches in case the gallery goes
out of business. Your piece will not be impounded or
attached along with the gallery's own inventory. If the
gallery has a contract for such things make sure you read it.
When you go over the contract make sure the gallery
insures this piece for the full resale value.  The
common practice is for the gallery to insure your art while
on their property, anything other than this is considered
strange. If there is a clause where the gallery can opt to
repair a damaged piece make sure the repaired art is
valued at mint condition by the publisher's
standards, not the gallery.
You should know ahead of time how long the
gallery has to pay you after your artwork has been
s o l d .  Most galleries will opt for a 30-day after-sale
payment. Though the more reputable and liberal ones will
pay you right away. Be sure you are clear on how long the