It's used in ex cond. The head is NOT the HW one.Used or new? Is the head handwired or PCB? If HW, that price is not too out of line. The cab is overpriced if used. I paid $400 for mine on the local CL, but I know that was a total steal.
2012What year(s)?
I have the B Cab version of that. Mine is a 1960BHW. It's got the Heritage G12H30's.Those 100 series cabinets are expensive and loaded with G12H30s normally. New they are $1400 each. The cab is a fair deal at 900.
The head depends on the year. I also would request they open it up and look inside to see the condition and what’s been done to it, no way I’d buy a stock vintage Marshall not knowing what it looks like inside unless your intentions are to mod the hell out of it and not preserve it.