Looking for some help to identify construction / value

[EMSims]

Evening, I was hoping for some help identifying the construction of this bass as it’s been about 10 years since I bought it and I’ve completely forgotten. I’m looking to sell it but I’m not 100% confident if it’s solid wood throughout or just the top. 
 

The bass is a 3/4 Andreas Zeller fo Stentor, made in 2008 in the typical amber gold colour. 
 

There’s a small chip on the edge of the back face on the bottom, I can’t see any evidence of lamination or ply. Likewise, there’s a knot in the wood on the back and I can’t see a smaller artefact of this that can be seen from the inside. This leads me to believe it’s spruce top with maple sides, and solid throughout… but I could be wrong. Any thoughts or tips? 
 

Does anyone know a typical value for this kind of bass? I appreciate it’s an entry level bass but I see wild fluctuations in prices online. It’s done me well so keen it gets some more use from someone else.
 

Thanks in advance, 

Ed