Battery management system help

I recently made and arduino based electric skateboard. It runs with a 6s3p 18650 battery pack. I got these batteries used so I knew I needed a bms. So I ordered a bms off of Ebay and when I got it the bms was very low quality. Can anyone show me a good reliable 6s bms under 20 dollars with reasonable shipping time.

I’d suggest you look on some RC forums for advice .

Good and cheap maybe a conflict. Buy a charger with balancing facility .

What chemistry and capacity?

They are lithium ion 2200mah 18650s