Check out the new Auto-Value algorithm which automatically calulates the vg+, vg, vg- and g values based on the m- value plus the rarity. Try it by entering rarity scores plus mint values....and please let me know if you think the method works! (It's in the purple G45 & Collector section).
http://www.g45central.com/Gtest/nutest4.html
The rarer the record, the more weighting is given to the lesser quality discs, according to the bosshoss proprietary Autoval javascript function below:
function autoval()
{
var m=document.getElementById("valm").value;
var rar=document.getElementById("rarity").value;
m=parseInt(m);
rar=parseInt(rar);
oneperc=m/100;
var xvgp=(oneperc*75)+(oneperc*rar);
var xvg=(oneperc*50)+(oneperc*rar*1.25);
var xvgm=(oneperc*33)+(oneperc*rar*1.5);
var xg=(oneperc*12)+(oneperc*rar*2);
document.getElementById("valvgp").value=xvgp;
document.getElementById("valvg").value=xvg;
document.getElementById("valvgm").value=xvgm;
document.getElementById("valg").value=xg;
}