Ton of Ebay auctions closing this evening, Sunday is usually busiest day on Ebay.
Gold iPhone 5s is still getting the most action by far, with many closing above $1600+ in the larger sizes (though at 16GB, some golds have started to sell for below $1000).
Next is silver iPhone 5s, selling for ~ $900+ in the 16GB size, and you're generally looking at $1000+ for 32 or 64 white iPhones.
Space grey is generally $150-$200 over unlocked contract price in all sizes, and seeing decent bid action.
If I were running a scalper team, at these prices, I'd definitely be hitting Apple stores this week as well, and would be buying every white and gold phone I could get my hands on and list them.
Once the online order iPhones start to get delivered, I expect this bubble to pop in a big way. So if you have an unopened gold or silver iPhone and are debating whether to sell it, my strong recommendation is to list it, and list it quick.