Most retailers have had the older models on closeout for a few weeks now. Best Buy, Amazon and Costco have had the M3 models for a few hundred off depending on models.

Watch SlickDeals. I think it was this time last year where lots of refurbs/2 generation old machines were going for massive discounts. Granted they were M1 machines, but some had 64GB RAM and 4TB drives for like $2700. Microcenter and B&H are good ones to watch as well.

The M-series macbooks depreciate in value far slower than any of the Intel models. M1 base models can still sell for nearly $1k. It's difficult to find a really good deal.

The refurbished store is always a good place to have a look through.