#2
Its a decent head but the backline stuff is generally lower quality. If your set on the head i'd check ebay. You can get them much cheaper. I would save up for something better quality though.
#3
i'd offer $150 for the amp, and no more! i would offer to "haul off" that piece of crap
cab for $50 and no more. a good working Peavey Black Widow 15" speaker is worth $50, the cabnet it's in is worth nothing. as is, you get a 150watt amp because of the 8ohm speaker/cab. it might be a decent start, but it's over priced. don't pay $400 for a $200 amp rig.