Obviously this would require a lot of digging up and math but I think it's useful in seeing how you're doing. Are you losing a lot on trade-ins? Are you buying crap games for high prices?
Anyway, I doubt many people do this but I did the math for all the money I've spent on Gamecube games (since I've only had them for half a year) minus all the money I've gotten back on trade-ins and sales on CL/Amazon. I came out to $4.37 per game, 30 games. I made the mistake of trading in some games for very little towards the start of buying but lately I've made a killing off of buying low at garage sales and reselling to afford the great games. Gamestop's BTGO sale also helped me out a lot.
Anyway, I doubt many people do this but I did the math for all the money I've spent on Gamecube games (since I've only had them for half a year) minus all the money I've gotten back on trade-ins and sales on CL/Amazon. I came out to $4.37 per game, 30 games. I made the mistake of trading in some games for very little towards the start of buying but lately I've made a killing off of buying low at garage sales and reselling to afford the great games. Gamestop's BTGO sale also helped me out a lot.