Pc icy eternal bow of fortitude

pc plz
13%>50 max damage
icy +27 hp req 10

how much would it be worth

1 normally
2 with a 4:1 vamp
3 with a 5:1 vamp
4 with a 4:1 vamp and +29 hp
5 with a 5:1 vamp and +30 hp

Thanks in advance

bump.