I'm going to buy a domain. First time, seller didn't reply my email and second time I offered him $500 for a 2 words .com domain which estibot says its value is about $950. Now, I think I could buy it cheaper and I made a mistake by offering $500. I thought he won't sell it lower than $1000 but now he accepted the $500 offer. How may I be sure that the domain is valuable like $500? Should I take a time and ask a 3rd party (my close friend) to buy it for lower price?