TheCryptographic(s) - Adding "the" to the start of an already sold domain was not a good idea. I don't see any value in this as Cryptographic means "relating to cryptography". Placing "the" at the start of it makes no sense at all.
Cryptopolity - A decent crypto brandable. However it also sounds similar to cryptopoly which is an active crypto board game. I'd price it up at $2,xxx and see if anyone bites.
KeywordDetective - I agree this would be a nice name for an SEO business. I would suggest pricing it up at low $xxxx.
CampecheCity.com - I have no experience with travel domains so don't want to offer an opinion
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FelizMama.com - If this is the correct spelling and translation (I don't know spanish or understand any intricacies the language might have) , this would be a nice little spanish speaking blog/site that with the .com extension would be useful for an American site focusing on spanish speakers. low-mid $xxxx
LeGrandCasino.com - Seems to be a few possible end users you could approach with this one already, such as
www.legrandcasinoonline.com which is already in use and your version would be an upgrade. Up to you how much you think you can get from the end users once you research them a bit.