Hi everyone, new here! I was doing some research on a few parts I'll be listing for sale but wanted to see if anyone here had any input on this keyboard specifically. I mostly tinker with old pc's so apple stuff is foreign to me. A friend of the family owned a repair shop in the 70s through mid 2000s and an unopened (even the shipping box) datanetics keyboard was among some parts that he had held onto. Other than the rarity of being NOS is there anything specific that determines value like model number etc? The part number on the shipping receipt is 661-91073.