From Apple Box of Parts → Product People Can Buy
You can't sell what you don't know you have. This becomes your "what's in the box" list for each tier.
Parts ($80) + Packaging ($5) + Shipping ($15) + Stripe fee (~$5) + Your time ($20) = $125 cost → Sell for $150-175
Instead of "Raspberry Pi 4 Model B 4GB" write "Small Computer (the brain)"
Instead of "SX1262 LoRa HAT" write "Long-Range Radio (talks to other nodes)"
Use "Payment Links" for fastest setup - no code needed. Or I can build a proper checkout page.
Ship first 10 orders yourself. Learn what breaks, what people ask about. THEN think about scale.