This is what I'm thinking for this spring in terms of the garden. I'm going all in on herbs.
Claude also gave me some good quotes on price.
Chives: 1–2 pots, $5–8 each
Mint: 1 pot, $5–8
Dill: seed packet, $3–5 (seedlings don't transplant well)
Basil (Nov): punnet of seedlings, $5–7
Rosemary: 1 pot, $8–15 depending on size
Thyme: 1–2 pots, $5–8 each
Oregano: 1 pot, $5–8
Sage: 1 pot, $6–10
Tomatoes (Nov): 4 seedlings, punnet $5–7 or $6–10 each if you buy named varieties in individual pots
All up somewhere around $60–90 for the herbs, a bit more if you go for larger rosemary/sage plants for a head start. Prices vary a fair bit between Bunnings and independent nurseries.