Melbourne labs phono stage.. 500 bucks reasonable?

Hey guys, i have a melbourne labs phono stage that i borrowed from a freind. It is a dual mono unit with external power supply. Its a tube phono stage with a grey anodized face and no marking as to a model. He built the unit and I am curious as to value of this thing. I think it sounds pretty awesome, but can i do better for 500 bucks for this one?? Seems to be around 5 years old.

Thanks guys - Evan