What is the most valuable?

[Astralav]

Hi,

between an original globe from a Crestworth, (with a bad quality glass, a little faded wax, and little cloudy liquid) and a brand new bottle from a Mathmos Jet, what do you consider the most valuable on the same lamp?

[Astralav]

Crestworth: red/yellow liquid

Mathmos: red/violet liquid

[Tim Gill]

The jet is more valuable, although the Cretsworth is older due to its condition its not worth that much and also because the colour is common.