Misspellings are theirs:
5 pc 4 layers size bellow 5cm*5cm pcb prototype sample produce fress shipping
Please be confident to send us your gerber file to our email box email@example.com and tell us the thickness, soldering pad plated,letter color,cooper weight coated. We will quote you a surprice price in two hours during our working time.
So you are paying them $8.50 just to look at your file? Also, the images they show are very simple two layer boards, nothing to inspire confidence in a complex 4 layer job.
I would give them credit for maybe not knowing how they are supposed to sell on eBay and maybe offering a product in a way that they shouldn't, but look at the recent sales of this "product" and their "feedback"!
Page after page after page of what appears to be robot purchases and robot feedback, most of them in the past few days.
Obviously it all stinks, but isn't this a pretty elaborate scam to try to get someone to give them $8.50 and maybe an attempt at more, but with a pretty sophisticated person (e.g. someone who designs PCBs isn't likely to be an idiot)?
What do you think of this? What are they up to exactly?