What is value and age of Ithaca 600 20ga over under and side by side?

The value of an Ithaca 600 20-gauge shotgun, whether over-under or side-by-side, typically ranges between $800 to $1,500, depending on its condition, features, and any unique attributes. Generally, side-by-side models may be slightly less expensive than over-under variants. Age can vary, as these shotguns were produced from the 1960s until the early 1980s, making them collectible among enthusiasts. Always consider consulting a firearms appraiser or dealer for precise evaluations based on specific details.