i know NET-A-PORTER marked down the clutch version last season. i don't remember if the bag went on sale, it may have and i just didn't make it to the sale in time.
probably not, im debating on getting one myself. my friend interned at PS over the summer and i asked if theres any slight chance of discount she said no, at least on the more iconic bags, they are coming out with a new line of vibrant colors for next season
NET-A-PORTER put the PS1 on sale at the end of last season and I got one at the sale price, but they sold out almost immediately. If any go on sale, it would be the more seasonal colors, I'd think.