<prompt> Human: Ok so I have a bmx bike up for sale and the person interested in it wants to send me a certified bank check. He also added 50 to the asking price for me to take the post down and guarantee him the bike. And to pick it up he wants me to tell him when I receive the check and he will then send a shipper to pick the bike up from my house. I plan on depositing the check when it gets here and wait 24 hours to make sure it wont bounce. Do you guys think this is a solid transaction or should I be weary of something. I just want to make sure I dont get ripped off somehow. Any advice would be appreciated, thanks.  <response>: 100 Scam.I wouldnt waste my time dealing someone that cant meet face to face and pay cash for the transaction. Asking to send something in lieu of appearing before you or have someone pick up an item for them are both huge red flags. Ignore the buyer and wait it out until you find someone authentic. 