Can you please state what health check you would like me to perform (if you are making an offer based on a health check)?
The drives have all been used in a HTPC that didn’t see much use at all (on once or twice per week for a movie). The Samsung drives are probably around 3 years old and the Seagate drives between 1 and 2 years.
The 2 external drives are around 12 months old. but it is best to assume that no warranty is provided (and you may be pleasantly surprised if you check the serial number).