Get the seller to give you the frame number, call up the police and find out if it's ever been registered.
Considering that's the only way they can return a recovered stolen bike to its rightful owner, if the coppers have no record of the serial number, then there's no way to know it's been stolen.
Get the seller to give you the frame number, call up the police and find out if it's ever been registered.
Considering that's the only way they can return a recovered stolen bike to its rightful owner, if the coppers have no record of the serial number, then there's no way to know it's been stolen.