Alex EislerCourtesy of Alex EislerBrown sophomore Alex Eisler has a lucrative side hustle selling restaurant reservations.He vends them on nascent platform Appointment Trader.Eisler told BI his most expensive sale was $1,358 for an omakase reservation in Boston.Need more proof that the scalper and bot-fueled restaurant reservation-selling ecosystem has intensified to new heights?Brown University student Alex Eisler has generated $105,000 in reservation sales since November 2022, when he joined Appointment Trader — an online marketplace that allows users to buy and sell restaurant reservations using an auction model.Eisler — a sophomore studying applied math and computer science — told Business Insider he's always been a foodie, and first stumbled upon Appointment Trader while purchasing a reservation of his own at NYC steakhouse 4 Charles Prime Rib.He then attempted to sell a few reservations on the platform procured through American Express-owned Resy and by calling restaurants personally.