You could get $500-$650 out of a 12 gauge and a 20 gauge should bring more. Good gun.
This. As well as what Brutus has said.
Here's a quote from Doublegunshop:
"I could argue that the SKB's of the not too distant past represent the penultimate modern machine made SxS wonder, extremely well fit and to an extent not always equaled by some better known and much more expensive names. It's well worth buying a clean SKB 100 and having it stocked to your liking, IMHO, but it is only that, an opinion. I doubt one can buy a better built gun for the money. OTOH, there are select guns from the same era or slightly earlier that had chopper lump bbl's, fine fit & finish & remain 'sleepers' in the present."
I have 2 Model 100's (12 ga. & 20 ga.) and never intend to sell them. Because if I do sell, I will never get them back for the same price. Internet shotgun boards are rife with statements like, "I used to own a Model 100 20 ga. and now regret selling it." Not only are SKB's made to the quality of top-end shotguns, they're frames are truly scaled to the gauge yet remain very sturdy. A 12 ga. Model 100 in your hands feels like some manufacturer's 20 gauges. My 20 ga. Model 100 feels livelier than a .410 double I used to own.
Now, just so as not to further drive-up the prices on SKB's, I do have three criticisms:
1) I don't like the Ray-bar style bead; I'll take a plain, sturdy brass bead any day.
2) You have to be mindful of hairline cracks where the stock meets the scalloped receiver. Both of my SKB's have had glass bedding done and once a year I check to make sure the thru-stock bolt is snug. IMO cheap insurance to prevent cracks or halt any existing ones.
3) In its 20 ga. configuration, the Model 100 is almost too light for clay games. Its a snap-shooter that shines in the grouse and rabbit thickets, but lacks the swing-smoothing weight that many target shooters like.
