Here is a message that an ArtSites artist got this morning:
Am interested in your artworks because am an art lover, am so excited to search through your artworks online, it really attract my attention and am willing to purchase from you directly. I would appreciate your response for availability with total cost. cashier cheque payment will be issued upon your name before my shipping company come over for pickup.
This one has several really big red flags:
So the basic scam is about you sending money to "the shipper" via Western Union after you think that you've been given a "good as cash" cheque. That's when the scammer will disappear.