dealer dash
Slang used in convention (e.g., Comiket) contexts: exhibitors rush to buy from other exhibitors before the event opens to general attendees.
wasei-eigo (Japanese-coined English), from dealer dash
At Comiket, the pre-opening dealer dash has become a well-known tradition.
ディーラーダッシュで目当ての同人誌を買えた。
I was able to buy the doujinshi I wanted during the dealer dash.
Wasei-eigo from English 'dealer' + 'dash'. Coined in Japanese convention culture to describe exhibitors rushing to buy goods from other exhibitors before the event opens to the public.