Mmm...minna no blowout (famitsu data)
 ▼ みんなのGOLF 97.07.17 PS 117.383 72,430 57,403 1,777,895 6.60 %
 ▼ みんなのGOLF2 99.07.29 PS 273,260 231,528 951,931 28.71 %
 ▼ みんなのGOLF3 01.07.26 PS2 272,758 105,189 74,057 921,906 29.59 %
 ▼ みんなのGOLFオンライン 03.06.12 PS2 18,326 - - 60,522 30.28 %
 ▼ みんなのGOLF4 03.11.27 PS2 475,269 162,671 95,988 1,083,079 43.88 %
 ▼ みんなのGOLF ポータブル 04.12.12 PSP 66,079 31,505 33,404 399,257 16.55 %
 ▼ みんなのGOLF5 07.07.26 PS3 %
廉価版
 ※ みんなのGOLF(ザ・ベスト) 99.03.25 PS 17,678 15,407 13,641 240,471 7.35 %
 ※ みんなのGOLF2(ザ・ベスト) 00.07.06 PS 9,708 10,139 9,984 399,352 2.43 %
 ※ みんなのGOLF3(MEGA HITS!) 02.07.18 PS2 4,364 9,525 7,601 304,574 1.43 %
 ※ みんなのGOLF4(ザ・ベスト) 04.07.08 PS2 4,638 7,116 6,189 228,432 2.03 %
 ※ みんなのGOLF4(ザ・ベスト) 05.11.02 PS2 4,616 5,684 4,478 213,837 2.16 %
 ※ みんなのGOLFポータブル(ザ・ベスト) 05.11.17 PSP 7,855 9,546 - 186,245 4.22 %
PSP game is a hair below 600k actually. MinGol1 was a 2m seller and if there weren't any other re-releases MinGol4 actually surpassed MinGol2 and MinGol3 sales.
MinGol5 will still bomb compared to those I'm sure, I predicted something along 200-something for the first week quite long ago but after seeing how badly Boku no Natsuyasumi 3 bombed (compared to previous entries) I'm not so sure of my prediction and would actually lower it if I had the chance.