A seller to whom the whole of the price has not been paid or tendered
A seller to whom more than half of the price has been paid or tendered
A seller who has received a bill of exchange as conditional payment and the condition on which it was received has not been fulfilled by reason of the dishonor of the instrument or otherwise.
A seller who has received a negotiable instrument as conditional payment and the condition on which it was received has not been fulfilled by reason of the dishonor of the instrument or otherwise