What Would You Prefer For A Giveaway Prize?

I'm thinking about running a referral marketing contest for a new software and trying to decide on prizes for those who rack up the most points. At first I thought about something simple like a $200 Amazon Gift Card, people could get whatever they want but I'm leaning more towards cool tech like a foldable keyboard or laptop monitor extender. Just curious to hear what people think would make great prizes! Feel free to add suggestions!