Would you be willing to answer a few brief questions about PlayStation Forums?
Yes with a timer just like Tatsumi said
Yes we want stock, who prefers timed mode?"Why would they put [Timed mode] in, no one likes [Timed mode], and if you think you do: YOU'RE WRONG." - Yahtzee Croshaw
Stock and 8 minute timer seems right.
Stock with time limit and no items sounds wonderful.