layton 108 is in fact the person who screwed you
rider99 is his ex gf (phone number search brings up her posts)
proof:
phone number come up here: http://nyspeed.com/forums/showthread.php?t=37843&highlight=507+3998
one of her other threads that mentions “her bf”
http://nyspeed.com/forums/showthread.php?t=36123
and the thread where he bf tried to sell it originaly:
http://www.nyspeed.com/forums/showthread.php?t=35420