Generally, I will buy a game depending on price and replayability. Such as I have no problem (ok yeah I do but I do it anyways) paying $30 for an expansion pack for the Sims2. Other games that are played and won fairly quickly I might pay the $20 for them if I've played them through a trial and really really liked it. For the games that either I've never played and unsure of or have played but didn't buy immediately I don't mind paying $10.

For the LDW games, I would pay the $20 for them. I play all kinds of games online and with the CD. I had never bought a game online even if I liked it I waited for it to come out retail. However, once I played the hour trial version of Virtual Villager I was hooked and had to have it right then I wasn't about to wait for it to come to the store. Virtual Villagers was my very first online game purchase. Since then I've purchase maybe four more, but I still tend to wait for them to come to retail.
Brat