I was in electronics for three decades. Truly re-manufactured units are just as reliable as regular goods. The vast majority of units returned to mfrs. by customers through stores have NOTHING wrong with them in the first place and these are carefully checked and repackaged at a bargain price with a warranty. We call these returns ESO's...or "Equipment Smarter than Operator" units. Be not afraid!
I do NOT extend the same feelings towards laptops or PC's where mechanical elements (keys, drives, etc.) are involved and may have wear issues.
No longer posting. Reach me by PM!