Went to get a hydrostatic filter for my CC 123 from NAPA (NAPA FIL1410). I was pleasantly surprised to learn all filters are on sale for 50% off(The 1410 filter was only $5.85!!)
I have no idea if this is national but the cheap folks that run my local NAPA wouldn't do this on their own
Also, I can't verify because the same outfit owns all the NAPAs within 20 miles so they all are doing it and none of the guys could tell me if it was national. They said the "thought so" because they have to ring it up under the annual "spring promotion", which is national.
If you plan on making this filter part of your fall maintenance I think the sale only lasts through Sept 30. Post back here if you are able to confirm the sale exists everywhere.