When setting up for their first show, they had a folding table with a microphone and bell for calling the match. They also had a keyboard on it when the director asked "are you having a yard sale?". But that keyboard was the brand new, state-of-the-art digital synthesizer, the Yamaha DX-7! In 1985, the proper reaction would have likely been "wow, where did you get a hold of that?!"...
Although set in 1985, the episode of Jeopardy! (1984) (Episode #3.135 (1987)) Sheila is watching didn't air until March 13, 1987.