Amazon has the complete series on sale today, for about $50:

https://www.amazon.com/deal/c9f505a3/ref=gbps_img_s-5_0f49_c9f505a3?&showVariations=true&smid=ATVPDKIKX0DER&pf_rd_p=56beed47-26cb-401c-95f5-738a157f0f49&pf_rd_s=slot-5&pf_rd_t=701&pf_rd_i=gb_main&pf_rd_m=ATVPDKIKX0DER&pf_rd_r=9KYGWBJ296W39VKGMECF