These are the search results for "buying S. Skullcutter" on TF2OP: http://www.tf2outpost.com/search/29089343

Most people, if not all, are selling for 1 scrap. Also, these two trades;

Too many Skullcutters: http://www.tf2outpost.com/trade/2781217

"I'll kill you if you sell me a Skullcutter": http://www.tf2outpost.com/trade/3205355

Not buying Skullcutters: http://www.tf2outpost.com/trade/2764537

Not taking any more Skullcutters: http://www.tf2outpost.com/trade/3918646

Not buying ATM: Skullcutters: http://www.tf2outpost.com/trade/3303056

Agh, forgot to edit the comment correctly, it's supposed to say "five trades"