Pre-Searing unopened 6th birthday present!

I have one 6th year unopened gift in Pre-Searing Ascalon as the title of the thread states. How much do you think this thing is worth? I'm assuming it's much more rare to have an everlasting tonic in pre-searing and hope to sell it for a pretty penny even if I have to arrange payment with a character in post searing. Thanks!

Not sure but I imagine about 100 black dyes in presearing 2-300e in post. Personally though I'd open it, cause even an El Dunkoro in pre could go very high