They look like kit speakers. Similar to ACI/Audio Concept Inc offerings. Though I'm not sure why the back panel has that opening? Not sure if it was for a rear ambiance tweeter, or maybe a vario-vent style port? New, ACI speakers were very decent, entry level high end speakers. But, if no longer stock, I doubt they'd be worth much. Pay accordingly.
If interested, there is an ACI Forum at Audio Circle. You might be able to find more info there.
Good luck.