From just scanning the prices, there's some decent finds right now. My criteria was "somewhat relative cartridges in 2022" and "decent price discount from when I remember buying stuff in the past 10 years." This is not a Buy it Now guide, but just some things that stuck out as some inexpensive quality stuff.

9mm Carbide Set - $36
7.62x54R - $23.13
.45ACP Carbide - $35.26
338 Lapua Full Length Set - $26.13
6.8 Rem SPC Small Base Set- $37.66
257 Weatherby Magnum - $34.40
.243Win SMALL BASE - $37.62
.22 Hornet FL Set - $26.13

Rando other RCBS things that are Cheap:
Shell holder #18 - 44Spl/Mag/Russian - $3.64
Shell Holder #2 - 6.5x55mm Swedish Mauser as well as various other wildcats and obscure/obsolete cartridges $3.64
Trim-Pro 2 Kit - $77.59

!!! Edit: I'm going to have to elevate this to a contender for "Deal of the Year" status: Rock Chucker Supreme Press --NOT KIT - $132.26

This is eligible for the RCBS FATHER’S DAY PRESS PROMOTION - R11973 for $35 rebate on the purchase of this kit, per the Mail in Rebate form ROCK CHUCKER SUPREME PRESS 9356 Price after rebate is around $100 once rebate is received, before tax.