The Pros Closet is this legit?

[deluz]

I found a really good price on an Ultegra Di2 derailleur at The Pros Closet.
Its says it is new open box, not covered by manufacturers warranty.
If I want to return I have to pay for shipping both ways.
I have read some really bad reviews on this company shipping items that were not working as described and then customers having problems returning it. So I am hesitant and I can buy it elsewhere new for about $25 more. Thanks for any input.