PLEX is one of the highly brandable name for any niche.
there are around 2000 domains already i found which uses Plex prefix.
around 40 tlds have been taken with this name.
Several Companies uses PLEX prefixed products
few open source programs are named as plex.
according to valuate.com its
CPC is 1.4$ so you can imagine the potential of this domain.
Sold !!! 