Is $500 a good deal/ fair price?

I’m not familiar with the quality of the parts used in this bike, is this a good price or way too expensive?

Seller says:

Specialized S Works Men’s Cross Cycle Bike

Please see photos for parts details as listed below

This is a bike that was custom made by a someone who worked at Cycle Loft

Frame: Specialized M4 S Works Aluminum

Lighter and stiffer than most carbon fiber frames

Groupset: Ultegra complete

Rims: HED Ardennes

Handle Bar: Rickey Carbon Logic

Seat Post: Carbon Fiber

Headset: Chris King

The rest you can see in the photos or ask a question and I will answer as best as I could.