Out of all of them, I like: talkwebpros.com and bannerpod.com the best since I think the names stick in your mind quite well. Talksexadvice is good for someone wanting to run a community, but do not see much value in the name, unless developed. Skinandgo is pure e-commerce play, in my opinion, will not be worth much unless it is developed into an active business. If you can set it up then you'll get away with a way better deal.

talkwebpros.com/.net ~ $100 for both
bannerpod.com $55-65

skinandgo.com/.net ~$300-400 developed with no revenue (whoever wants to start a business selling skins)

Best,