How much is a Strom 5 string open back banjo roughly worth serial no 2436 made in Grand Rapids Minnesota?

Strom style #5 open-back banjos are typically valued anywhere between $1,000 and $1,500, depending on their condition, rarity, and any modifications or repairs that may have been done to them.

The serial number 2436 indicates that the banjo was made in 2006, which puts it in the later production years of the Strom company. However, it's worth noting that the rarity and value of a Strom banjo also depends on the specific features and materials used in its construction.

To determine the exact value of your banjo, it's recommended to have it appraised by a professional instrument appraiser or a luthier who specializes in banjos. They will be able to assess its condition, rarity, and any factors that may affect its value, providing you with a more accurate estimate.