This will depend on your overall budget and the number of winners. However, a pre-pandemic study by the Incentive Research Foundation found that top-performing companies spend almost $4,000 in non-cash rewards each high-performer. (1) _________________ SOURCE: 1 https://bit.ly/3A11O3Z  

This depends on your organization, your goals, who will be participating, and other factors. Gavel would love to help you with this planning.