Can't add item

[bec]

Hi,

I've tried to add this item:
http://www.ebay.com.au/itm/Black-Milk-Clothing-Kawaii-Grey-Swimsuit-BNWT-SMALL-SOLD-OUT-/221175476049?pt=AU_Womens_Clothing_2&hash=item337f15ef51&_uhb=1#ht_500wt_1109

And when I put the item number in gixen I get this error message:
"Could not add this item (221175476049)(1)."

Please help. I really want this item

[bec]

Yeah.... just realised it was a buy only... sorry about that!