Off White Comic Website Amazing Spider-Man Comic Values?

Amazing Spider-Man Comic values? - off white comic website

How much money do you think each of these comics are worth? How do I pay them?

It is free to reply to everyone. Although it would be more than happy to any person who collects or know hear a lot about comics.

Thanks

They are:

Amazing Spider-Man 39 CGC 8.0 Off-White Pages.
Amazing Spider-Man 40 CGC 7.5 White Pages.
Amazing Spiderman 129 CGC 9.0 White Pages out --
Amazing Spiderman 300 CGC 9.6 White Pages

All these comics are in Volume 1 1 poison, 1 Punisher, story arc and Green Goblin (unmasked, defeat)