I buy the newer stuff where I can find it cheapest. If that means online, so be it. However, for my older systems, the 'net is indispensable. The Trade Depot, ebay, GTZ, and online stores makes is a necessity. I've bought stuff online that would be impossible for me to get here otherwise (Puerto Rico has no import stores at all). My Genny, SNES, Neo, and Duo collection depend on the internet for games. I've also gotten unheard of deals online as well.
100% (maybe 80% eBay). Since I buy 99% of my games sealed, I have to turn to eBay for the occasional Genesis, Turbo Grafx 16 or whatever that pops up. The other 20% goes for newer games, which lately have been imports or games that I can get a good deal for that I couldn't find locally.
I'll probably go back to local stuff once I'm caught up on my older systems and get a PS2 and/or GameCube.
I rarely find games around here to pick up that I can use.
Especially with new releases, the Internet is my lifeblood... though ultimately I MO everyone and don't use Paypal.
I've never purchased anything off the internet before.
The only games I have ever bought online are Sin & Punishment and Lords of Thunder.
I live in Canada and our dollar is worth shit so it's very expensive for me to order anything online since most things are in Yank dollars.
I will use Ebay more in the future since there's no other way I'll find a lot of the obscure stuff I want.
Since I mainly buy imports, almost 100% internet here.
If it's an import or I've run out of places to buy it, I turn to the internet, but it hasn't been my main purchasing place at any point.
I buy almost all recently or newly-released games in stores, unless some special deal comes online where I can get it cheaper or it comes with some nifty extras I can only get online.
But in terms of imports and older titles, I get 95% of those online, through eBay, GameTZ, and a variety of online import shops.
A very useful tool the internet is :p
Almost my entire post-1994 game collection came from the internet. I just don't understand people who give FuncoLand or EB business when you can get the same game for 20-50% less online without the misinformation and idiocy, not to mention sales tax.
Where do you shop to get new games that cheap? Most of the places I turn to have new titles for only slightly less than stores, and the shipping cost doesn't make it worth saving on sales tax. Only time I've bought new games online is when KB or Outpost.com are running a particular special that I can't pass up (like RRV for 25 bucks back when it was only a couple of months old)