Gold drops need rationalising a fair bit. I think the best way to do this right now is to move the gold drop amounts off into a new file, gold.txt, which looks something like

 # File: gold.txt
 # specifies level/avg gold drop on that level pairs.
 # levels not specified are interpolated between those specified.
 # the values below are approximately correct for moria all the way to angband 3.0.9.
 level 0, avg 11
 level 20, avg 20
 level 40, avg 35
 level 50, avg 55
 level 60, avg 125

The average is then used as the centre of a standard distribution. This provides approximately the same results as now, but with more flexibility. Also, gold objects can be selected just like any other object -- get the base type then set the attributes, rather than the current select base type and that also sets the amount dropped.