Looks legit to me, I've been a buyer/seller on eBay for 15 years.
139+ feedbacks this year, good selection of a single product line (Mac Pro), not some seller who is just pawning off estate sales and random junk, etc...
Mac Distributors is powered by Edit Builder L.L.C (leading supplier of edit bays in the USA) and is a platinum selling eBay store with 100% feedback for the last 6 years. We handle all special requests and can be reached at the following emails:
Address: Las Vegas, NV We are partnered with SMG in Los Angeles (a rental/warranty company for edit bays) who can setup and install our bays to any post house in the Los Angeles area.
They have ordered computer parts from us in order to fix their used computers for resale and after that tried to keep the parts and money. I would avoid dealing with Edit Builder L.L.C as a suggestion.
Be careful and if you feel beeing a victim of Fraud or Scam please make sure to report them since if they do it to suppliers then they will do it to customers as well.