They're not bad domains but they're not domains that give me goosebumps.
InternetSEO.com I could see selling for $xxx - $x,xxx, although a little redundant, there is no SEO off of the Internet, but eh, it still has a ring to it. Internet Search Engine Optimization.
I don't think SEO domains are smart long-term investments because with Google's algorithm constantly phasing out "seo tricks" I think a few years from now SEO "services" as we know them will be dead and "Search Engine Optimization" will be performed by simple plug-ins and automated tools because beyond that only your actual content is going to help in your ranks. I'd be motivated seller on this one.
Dating domains are a little in demand right now, I think because of all of the whitelabel affiliates out there, you could probably get $xx - $xxx for MobileDating.com. It is generic but the dating industry has always been fond of brandables and not so much generics, that's why you don't see "Dates.com" or "Dating.com" in commercials, you see "eHormony.com", "OnlineBootycall.com" or "ChristianMingle.com".... even the free ones "PlentyOfFish.com". I'd be a motivated seller on this one too. Dating domains are good for quick flips but for long term, not so much.
G'luck