Well my black friday sale sounds very good!
I'm pleased and wouldn't be discourteous enough not to congratulate you on your bargain.
I too have bought things blind in sales but usually when it's been a price not to bother me if I didn't like the results.
It's usually a good rule of thumb to demo whatever it is in regards to HIFI's especially when it's of high value akin to buying a car it's best to know if it's the best for the money etc in comparison to whatever else is out there.
Most things sold in the sale are non returnable if not faulty so its fortunate you like it.