To be honest, mentioning only 5 collections in this list is very limiting.
So, I couldn’t leave Sappy Seals out. Don’t forget this issue is about builders who keep building, collections launched in 2021 that are still here providing value for their holders.
So, what about the seals?
If we speak about builders, probably they are those who built the most.
Only roughly 200 seals are available on the market (seals are a protected species after all!) since most of the 10K items are stacked.