PC: GPBs (req.8 15^50, +5e), serpent axe, +5e on zodiac

I had all of these weapons for a while and want to know how much they're worth these days. Thanks.

1) golden phoenix blade req. 8 +5e
2) tyrian serpent axe req. 9 dmg +14 (while enchanted)
3) zodiac axe req. 9 +5e
4) golden phoenix blade req. 8 15^50

Gpb +5ene 100k +30-40e imo
gpb 15^50 100k +20-30e imo
Zodiac axe 20-30k
Serpent Tyrian or canthan skin?