New to selling oversized stuff on Amazon and need some help from those who’ve been there. I’m looking at a 200kg, high-price item that requires assembly, shipping FBM from my 3PL. The manufacturer is asking for a 30% deposit upfront, which has me a bit nervous.

I’m hoping to get insights from three angles: seller, buyer, and manufacturer. Specifically, I’m stuck on:

Seller perspective:

  • Day-to-day operations (any hidden work I’m missing?)

  • Ads (Heard SB is better for large items – is that true? Any CPC tips?)

  • Returns (terrified of this – how do you handle it without losing money?)

  • Promotions (high-ticket items are hard to move – what works?)

  • Warranty (how long should I offer? What’s realistic?)

  • Shipping (ocean freight vs. trucking – best practices?)

  • 3PLs (what should I look for in a 3PL that handles heavy gear?)

Buyer perspective:

  • Assembly (do buyers hate complicated setups? How to reduce complaints?)

  • Usage (any common user mistakes that lead to returns?)

  • After-sales (what do buyers actually expect when something goes wrong?)

Manufacturer perspective:

  • Red flags to watch for (don’t want to get scammed or stuck with bad quality)

  • What to negotiate upfront (delivery times, quality guarantees?)

Also, 6 specific questions I can’t find clear answers to:

  1. What are the obvious AND hidden pitfalls of oversized products? I’m new to this, so lay it all on me.

  2. How do you deal with malicious returns or refund-only scams? Amazon’s account manager said they can’t intervene – is that really the case?

  3. Does shipping insurance actually help? What proof do I need from carriers to fight fraud?

  4. What’s your go-to for normal returns? And what about malicious ones – any way to fight back?

  5. Risks for a new seller account (e.g., sales spikes triggering reviews)? How to avoid getting flagged?

  6. Any special account settings I need for oversized items vs. regular products?

Any real-world experience would be a lifesaver. Thanks in advance, guys – really appreciate it!