MSRP of the outgoing generation of hardware almost never sees a price drop. If anything, stores just have a fire sale to get rid of whatever stock they have as was the case over the previous weekend in the US, mostly due to being a holiday. And to make room for the new CPUs.
MSRP aside, retailers will do whatever they have to in order to clear inventory. We're already seeing some prices fall at retail...I seem to remember reading the 5800X was being offered at it's lowest price ever. That may be a sale price, but then sales are a time honored way merchants have of moving 'old' stock quickly aren't they? And probably the best time of year to look for big sales is coming up...it's the Cyber Monday/Black Friday sales period. Usually at the end of November.