These are some parts and motors I've ordered. Not all have been vetted, but this provides a record of their source.

Motors
Type | Price | Source | Notes |
---|---|---|---|
n20 6v 500rpm | $1.97/ea | https://a.aliexpress.com/_mNLg48i | |
n20 6v 300rpm | $0.68/ea | https://a.aliexpress.com/_mP0aLKa | |
"Spicy" n20 | $0.55/ea | https://a.aliexpress.com/_mPVpUeA | |
"Spicy" n50 | $0.81/ea | https://a.aliexpress.com/_mMmHJMQ | |
ChiHai 16mm 700rpm | $12.55/ea | https://a.aliexpress.com/_mLiNOYK | |
Emax 1104 4300kv | $1.70/ea | https://a.aliexpress.com/_mqh2Aie | |
20mm Planetary w/130 motor | $1.20/ea | https://a.aliexpress.com/_mtMWO6e | |
"Spicy" 030 | $0.45/ea | https://a.aliexpress.com/_mOF3498 | |
"Spicy" 050 |
Electronics
Type | Price | Source | Notes |
---|---|---|---|
FS2A | $8.30/ea | https://www.aliexpress.com/item/4001112099097.html | |
Brushed ESC | $3.80/ea | https://www.aliexpress.com/item/4001281617740.html |