Era
This is when the old makers changed hands. Rockwell Manufacturing became Rockwell International in 1973, and one VintageMachinery.org history says many machines suffered from its cost-cutting. Rockwell sold Delta's machinery business to Pentair in 1984, Houdaille sold Powermatic in 1986, the same year Oliver filed for bankruptcy, and Powermatic started its imported Artisan line in 1988. Delta's 8-digit date-code serials arrived in 1982, and on those you can read the year and month straight off the plate.
6 models we cover.

Delta
Table saw$1,275–$1,400 typical ask
5 on eBay

Delta
Table saw$480–$480 typical ask
2 on eBay

Delta
Band saw$800–$800 typical ask
5 on eBay

Craftsman
Table saw$590–$590 typical ask
2 on eBay

Craftsman
Band saw$150–$230 typical ask
228 on eBay

Craftsman
Drill press$600–$600 typical ask
130 on eBay