I think the reason that not many people are biting is that all the ATI Never Settle games were on sale recently for fairly close to these prices. I think Hitman was at $30, as was Sleeping Dogs at $22.49. Anybody who wanted em may well have already picked em up.
The only game I haven't seen price dropped was FC3, and the fact that it's from the ubishop instead of though Steam might turn some people off.
Also, as you said, you got these in the ATI Never Settle bundle, so some people might feel it's a bit steep selling what you got essentially for free for those prices. I'm not saying this is your problem specifically. Buyer's market, everything is worth what the consumer will pay and all that, I'm just noting it.
They are indeed good games, but if you're looking for a reason they're not moving, I would consider this.