  Temperature-dependent in-plane, $\rho_a(T)$, and inter-plane, $\rho_c(T)$,
resistivities were measured for the iron-arsenide superconductor
(Ba$_{1-x}$K$_x$)Fe $_2$As$_2$ over a broad doping range from parent compound
to optimal doping $T_c\approx 38 K$, $0\leq x \leq 0.35$. The coupled
magnetic/structural transition at $T_{SM}$ is clearly observed for samples with
$T_c <$26 K ($x <0.25$), however its effect on resistivity is much weaker than
in the electron-doped Ba(Fe$_{1-x}$Co$_x$)Fe $_2$As$_2$, and the transition
leads only to a decrease of resistivity. In addition to the feature at
$T_{SM}$, the inter-plane resistivity shows a maximum at $T^*\sim$200 K, which
moves slightly to higher temperature with doping, revealing a trend opposite to
the electron-doped materials. A smeared feature at about the same temperature
is seen in $\rho_a(T)$. For $T<T^*$, the temperature dependence of resistivity
shows systematic evolution and is close to linear at optimal doping. This
feature, being most pronounced for $\rho_c(T)$, suggests the existence of a
quantum critical point close to optimal doping.
