Replying to What should i do !?

hey i have a problem here that i hope you guys can give me some advice on. I recently ordered a pair of brand new 04'05 salomon 1080s off of some one on this forum (not going to say name so as to not ruin his rep). I ordered them almost three weeks ago and still have not received them. The guy i bought it off told me it was going by air and it would take about 4-5 days since it was crossing the border. He then told me he would send me the shipping information right after he sent them, which was about 3 days after i made the transaction. I have yet to receive the shipping information or any word form the seller. I have sent messages to his NS account and his email acccount several times wihtout any response whatsoever. Im really getting worried here, I spent $285 on these skis and dont have money left to buy another pair. What actions do you all suggest i take ? thanks