Springfield GI and a trip to the Custom Shop for sights and beavertail.
$466 for the GI
$260 for sights & milling
$100 for beavertail
$??? cost of hammer
$80 for re-parkerizing the finish.
you can get a Loaded, which will be the same thing, but with front cocking serrations.
or save a little and get a NIB TRP for ~$1272