Have over 100 domains. Half of them are 5 years old, half of them are 3 years old. Some of them are premium domains (2 words), rest of them are 3 words. All of them are niche domains (big niche). All of them are indexed. Some of them have thousand of pages indexed per domain. Only problem is that I don't make much money off these sites. Currently I like to shift my business toward others, not adsense and affiliate incomes. I am thinking about to sell my domains and websites. Need some help and advice how you would like to handle the situation? Flip domains (premium domains) or flip websites? Is there a great tool to caculate value of domains? Any tips and advices are appreciated.