the domain is interesting. It is not that it is bad...It just would not have the demand as something like custom car would be better.
But it would be too easy to go crazy w/ the prefix custom. There are not that many monthly searches for custom purse either. It would also be easy to rank it as even this thread is in the first page of Google.
There are a few ads for custom purse though and this makes me think that you might be able to sell it.
worth keeping. $xx possibly xxx to an end user.