What are Envoy HID lights worth

I have a set of envoy headlight assemblies that I don't need anymore. How much should I ask for them ralistically? I bought them at a gm dealer about 2 years ago. At that time they were selling for $850 a piece. I don't know what they are worth to anybody. Any suggestions?

i sell infinity ones for 200.00 a set but those r mostly for conversions. yours u could 500.00 i would think ?

i got sum range rover ones too