I am more than happy to help you with questions related to Victorian-era fairy lamps. Contemporaty or modern candle lamp inquiries are better addressed by those more knowledgeable than me.
However, I can not help you with determining a value. There are simply too many variables that effect the value. If you inquiring about a value, I would suggest you direct your research toward past auction sales of fairy lamps. In addition, the 1996 book "Fairy Lamps" by Ruf has "book values". that may provide some meaningful value information. But, again, there are many variables that effect value.
Depending on your inquiry, I may ask you for a photo in my reply.