<script>
let lists = [
  {min:     0, max:        50, price:    1000},
  {min:    50, max:       100, price:    5000},
  {min:   100, max:       500, price:   10000},
  {min:   500, max:      1000, price:   50000},
  {min:  1000, max:      5000, price:  100000},
  {min:  5000, max:     10000, price:  500000},
  {min: 10000, max:     50000, price: 1000000},
  {min: 50000, max: 999999999, price: 5000000},
]

input = 200
let list = lists.find((v) => (input > v['min'] && input <= v['max']));
console.log(list);

// 結果
// {min: 100, max: 500, price: 10000}
</script>