question about a bidder

[def.a.posting.id]

why would someone with an ID from 2016 with a 0 for feedback bid on my item??

should I be nervous? 

[wesk_36]

I wouldn't be nervous on that alone.

I would be happy for the bid; their absence doesn't mean anything.

[def.a.posting.id]

ok thanks

I just don't want this person to buy my item and return a bag of rocks