Go to eBay -> Search Nova -> Filter Indoor Games -> Select Completed Listings -> See what some Novas have (or haven't sold for)
It isn't an exact science as every cue differs but it is another good starting point. Many AZ'ers scan eBay daily so chances are if they wanted something at a given price they would have bid.
Snap a picture of your cue and then go to the Main Category section, open a thread, download the picture of the cue and then patiently wait for someone to answer.