I know a few years ago the official youtube channel would put up entire series and rotate them out for every couple of months or so(which is how i ended up first watching Z Gundam for the first time), but they always seemed only put up subbed episodes even for series that had dubs too. Maybe it's just a license holder thing where the old dubs are kind of an afterthought. Luckily the Blu Rays/DVDs cover both and they've done a good job of releasing just about everything at this point, though they are a tad bit on the expensive side, usually like 40-50 bucks for 25 episodes or 30-40 for a shorter series or movie. Though they certainly aren't Aniplex bad expensive,300 dollars for the Persona 5 dubbed blu ray(and that's on sale from the MRSP of 400)!