Uncanny X-Men [Campbell Sketch] #510 worth

The Uncanny X-Men [Campbell Sketch] #510 (1999) is valued at $4950 used according to the catalog data. This high value is driven by the specific artist (Campbell Sketch) and the rarity of the issue. To get a full picture, you can compare this sold value against the current live asking prices shown on the screen to see if it's currently priced at a premium or a discount.