It's hard to say really. You pay LE80 for entry into the Valley of the Kings which allows you in three tombs. The LE100 extra for Tutankhamun alone. As far as the tomb goes it's fairly small, two rooms are all that you get access to. The decoration is still visible, but there are many other tombs in the Valley of the Kings that are larger and more impressive to view. It's up to you really, you pay extra, to see not a lot, but you CAN say you've been in Tutankhamun's tombs. It's a personal choice.
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