OK, just trying to be helpful here....
You should consider starting a fresh auction in a broader forum. This one is more for collectible stuff, crypto coins, notes and things.
Probably better to put it in the "Goods" forum:
https://bitcointalk.org/index.php?board=51.0Also you should mention where it's shipping from i.e. what country as this may be helpful information for the buyer, especially with a sensitive item like this one.
The picture you provided is good but for a second hand item, especially one that's been hooked up to propane, you can assume buyers will want to see more pics than just the serial number.
The starting price looks fairly high - just my opinion. For example, brand new (never used) ones have sold on eBay for $2,500 in the past week
https://www.ebay.com/itm/BRAND-NEW-NEVER-USED-The-Boring-Company-Not-a-Flamethrower-5-Letter/274530506864?hash=item3feb4b1870:g:K10AAOSwLGRfg7sO You're asking about $3,800 for a used one.
Offer buyers the use of escrow, which means that they can send the ETH or BTC to a trusted member on the forum, who while release it to you once you've shipped the item.
Good luck!