Another fan of Penzey's Spices here. DW buys dozens of blends in addition to the basics. (Some spices, e.g. cumin, are much cheaper in bulk from an Indian market.)
A basic meal around here is grilled skinless chicken breasts. With different spices, it takes months to repeat.
New Journey: 10 years
In maintenance phase: 8 years and 6 months
Following Dr. Judith Beck via 3FC's Beck Diet Solution Forum: 8 years