the gb4000+amp is OK... it does not penetrate the body as good as any PLASMA units...
What i have that compares to gb4000+amp But less then HALF the price.
Is BCX211 and 411 combo ! which does have plasma tube handles unlike the gb4000+amp . I would accept $1100 its $2700 new! spooky 2 i do not recommend unless spending $1100 is going to make you homeless... as $1100 is an investment that will hold its value and provide much more value to you weekly when using.