Is the DKAF8 MS good for a first 8-string?

It is a reasonable entry into extended range: the fanned scale helps low-string tension and the neck is reinforced for stability. The wide nut and 8 strings still take getting used to, so try one if you can.

How does the multi-scale neck feel compared with a straight-scale 8-string?

The fan is moderate, 26" to 28", so chords and leads stay familiar while the low strings get a longer, tighter scale. Players used to straight necks usually adapt within a few sessions.

What pickups does it have?

Two Jackson 8-string blade humbuckers, wired to a master volume, master tone and a 3-way selector. The blades handle the wide string spacing without misaligned poles.

Does it come with a case or gig bag?

Not guaranteed on this B-stock instrument. New units normally ship with a case or gig bag, but confirm what is included before buying.

What condition is a B-stock guitar in?

It is a factory-second instrument that may have had minor cosmetic flaws or shipping damage, addressed and refinished where needed. It is sold as playable, but expect possible finish marks.

What tuning and string gauges suit it?

The 28" bass scale handles low tunings such as drop E or F# well. Use an 8-string set matched to your tuning; heavier gauges on the low end keep tension right.