From time to time the system does not allow us to view a member's listings, this is happening now to me,  and I cannot see your items for sale, so cannot give you the definitive answer you need.

However,  it's a fairly new change that buyers,  cannot view / see the Buy it Now on their own listings,  but be assured, everyone else can and c an buy your items via the BIN button.

Or ,  if you have an auction item and it has a bid,  then the Buy it Now option disappears,  and the sale runs along in auction style only,  in fairness to the other bidder(s).

@phil-218