On Amazon https://www.amazon.com/Sims-Expansion-Bundle-PC-Mac/dp/B00C4PCCL4/ref=mp_s_a_1_1?crid=2DMZV457T62H8&keywords=generations+bundle+sims+3&qid=1664386577&qu=eyJxc2MiOiIwLjkwIiwicXNhIjoiMC4wMCIsInFzcCI6IjAuMDAifQ%3D%3D&sprefix=generations+bundle+sims+3%2Caps%2C125&sr=8-1
Generations and World adventures bundle for less than 20 bucks!
I'd buy bundles as much as possible to save money.