How much are these cards worth?

[Shiny Noctowl]

All are mint or near-mint:

Shining Noctowl
Skyridge holo Kabutops and Starmie
Sneasel ex
Gardevoir ex
Blaziken ex
Sceptile ex
Registeel ex
Sharpedo ex
Walrein ex
Flygon ex δ
Metagross ex
Jolteon *
Porygon-Z LV.X
Azelf LV.X
Secret rare Charmeleon
Shiny Lotad
Shiny Vulpix x2

 

[Shinx3000]

OK, I have looked about and found other sellers that are selling the cards you have and the ones I did find, I came up with (all in £):

Registeel ex - around £15.00
Secret rare Charmeleon - going for near £11.00 on eBay
Skyridge holo Kabutops - was going for £10.00 on eBay
Sneasel ex - around £10.00
Porygon-Z LV.X - £10.16
Metagross ex - between £12-29

Don't have time to look up rest, hope it helps a little