Here's the math breakdown: Like it or not, our modern economic system left the gold standard long ago and is now based on the petroleum standard. Just watch how much people gripe when gasoline prices jump $.20 a gallon if you need proof. Having said that, consider gasoline prices in the early 1980's compared to now. Even with the Jimmy Carter gas lines of the late 1970's, gas prices may have reached $1.00 a gallon and people freaked (and rightfully so I might add). The Ron Reagan years saw gas prices generally in the $.80-$1.10 range. These were the years when 2600 and INTV games were selling for $40 (and sometimes more) each. Fast forward to 2013 and we regularly pay close (if not higher than) to $4.00 per gallon for gasoline. Considering that this is approximately 4x the going rate in the early 1980's, divide the $60 for a homebrew by 4 and we are essentially paying $15 in early 1980's dollars.
Now, I admit that is business mathematics, and does not always automatically apply, but it does give us somewhat of a measuring stick. That said, I will continue to loathe paying what I consider higher prices for classic and even homebrew games. Maybe because mostly I am a cheapskate at heart