Depending on what you're looking for, here's a few things I've gotten from Amazon over the years and have had good experiences with them:

• These are cheap, waterproof, decently durable and on par with $100 gucci-gear rain pants: https://smile.amazon.com/dp/B0002UR7PY
• Very light fly rod if you're into fishing: https://smile.amazon.com/dp/B00N36YY1O
• Water bladder with smartwater-type threads for easy attachment to Sawyer products: https://smile.amazon.com/dp/B000AQYY38
• The exact one I have is no longer available - but a nice 3" USB cable for my phone.
• Decently reviewed stove if you're into IsoButane fuel: https://smile.amazon.com/dp/B01N5WRJ8A
• Toothpaste tablets (you can make your own or find something cheaper): https://smile.amazon.com/dp/B003UY1NMW
• Lightweight compass: https://smile.amazon.com/dp/B000BSDU4Y
• Not crazy durable, but very lightweight and cheap to replace rain jacket: https://smile.amazon.com/dp/B01MQJ995C
• Lightload towels: https://smile.amazon.com/dp/B000UGVI4G
• If you can splurge some weight, I like this cook kit: https://smile.amazon.com/dp/B003DKK7MU
• If you want to go lighter, you can get something basic: https://smile.amazon.com/dp/B002AQET2C
• I use this stuff to make pot holders, koozies, shoe inserts, etc: https://smile.amazon.com/dp/B000BQSYRO
• Cheap / lightweight knife: https://smile.amazon.com/dp/B000WYZHDO
• Deuce of Spades: https://smile.amazon.com/dp/B06XG245XD
• Cheap summerweight sleeping bag: https://smile.amazon.com/dp/B01LZKAC25
• Lightweight pen: https://smile.amazon.com/dp/B0018RHUM0
• 3oz, 10watt solar panel (I have this, it's far better than those 3x the cost - but it's still solar - so have reasonable expectations): https://smile.amazon.com/dp/B01MCXZJ8Y

Most of these are more luxury and lightweight than true ultralight - but these are some of the things I've gotten some enjoyment from. Your mileage may vary.

(edit: formatting)