Keep an eye out for a "deluxe" edition, as they usually include some expansions with additional content for a reasonable price.
They are notorious for releasing the basic Sims game and then piling on expansion after expansion, when really they could have included a lot of that content in the original release. It's quite the cash grab, but since they are already onto The Sims 3, you should be able to grab a version of The Sims 2 for cheap.
Sometimes the expansion content is just items, but other times it alters gameplay in a useful way.