Basil Gogos Prints - Questions about value?

[j3ll0]

I have a friend that is wanting to sell some Basil prints that are signed. I am getting mixed info on what they would be worth. He needs money and I was thinking if I bought all of them at $150 it would be worth it.

He has a print signed of the Dracula women in the link below...it is the top image.
http://www.universalmonsterarmy.com/forum/index.php?topic=17175.15

He has the color print signed of creature from the black lagoon shown  here
http://www.universalmonsterarmy.com/forum/index.php?topic=3427.0

He has this Frankenstein print signed...you have to select the other print to view it
https://comics.ha.com/itm/memorabilia/superhero/basil-gogos-gorgo-and-frankenstein-s-monster-print-group-of-2-undated-total-2-items-/a/121718-15724.s

And last he has this Dracula print signed.
http://collectorsshangri-la.com/gogos-signed-dracula.html

Thanks for the help!