Type
Small folding drones you can carry in a jacket pocket or a day bag, from DJI's Mini 4 Pro and Autel's EVO Nano+ to Parrot's ANAFI, Yuneec's Mantis Q and small GPS drones from Holy Stone. Several are built to come in under 250 g with their standard battery, which matters in the US because a drone under that line flown purely for fun doesn't need FAA registration or Remote ID. A heavier battery or add-ons can push it over. Used, these take more knocks than big drones, so look for cracked arms, bent props and a gimbal that isn't level, and count what comes in the box.
7 models we cover.

DJI
Compact travel drone$625–$875 typical ask
128 on eBay
Autel Robotics
Compact travel drone$625–$725 typical ask
2 on eBay

Parrot
Compact travel drone$550–$1,000 typical ask
5 on eBay
Yuneec
Compact travel drone$310–$725 typical ask
6 on eBay
Holy Stone
Compact travel drone$340–$360 typical ask
5 on eBay
Holy Stone
Compact travel drone$110–$160 typical ask
42 on eBay
Holy Stone
Compact travel drone$100–$160 typical ask
9 on eBay