ProSource of Nassau 99.82 Rating Score™ Other Of 22 ratings/reviews posted on 4 verified review sites, ProSource of Nassau has an average rating of 4.98 stars. This earns a Rating Score™ of 99.82. View Profile & Reviews 08/21/2018 Verified Very helpful, entire transaction took less than 10 minutes. Was told product would take a week or two for delivery however it arrived in three days. Wonderful , friendly and helpful customer service.