Old wine, bin or keep for best?

[The Surveyor]

Doing some tidying of cupboards and found these dusty relics at the back.

2005 Gigondas and
2007 XV du President

I like wine but I'm no expert so are these aged wines likely to be horrid, or nicely aged and utter nectar to keep for a special meal?

Any wine expert's who can guide me, down the sink, open and try, save for 'best?

[The Surveyor]

Thanks all.

I'll open them up and be ready to bin them if they're foul.