What does the experts think of the $$

Problem is even when you price cards according to what they sell for you get these guys who will still offer you ALOT less than its worth. Best example I can give is My T205 Cobb and 54 Aaron RC. The Cobb is at $650 BIN or BO and is a 1-1.5 grade. They are selling for $500-$700 in recent sales yet I get offers for $250, $300, and a few for less than $100 because it is fake Glad they are not graders!!! Then the Aaron is a solid grade 4+ and are selling for about $400+ yet I get offers for $300 or less on a weekly basis and mostly from the same 5-6 people. Like I am going to break down and give it away for less than market sale. So either way you could ask for alot or just right and you will get neither. Just my opinion