転売 is read as てんばい (tembai) and means resale.
てんばい
tembai
ころぶ
(for a geisha) to prostitute (herself) in secret
ころがす
to buy and sell (quickly for a profit)
ころがる
to lie down
てんせい
transmigration
てんそう
transfer (of data)
てんよう
diversion
てんじる
to turn
てんてん
rolling about
てんしゅつ
moving out (to)
てんにゅう
moving into (a city, etc.)
てんこう
changing schools
てんずる