I think it’s around 20/month now for O’Reilly learning (the new name for safari books). I’ve had it for around 5 years now, and I don’t ever recall having a limit on number of items. I feel like they have actually got better, with some really good video courses included as well. I’m just completing the second of two courses which are available elsewhere for $99 each, so I’ve almost paid for the year. I really like the idea of having this huge library I can dip into when I want to look something up, rather than getting lost in large amounts of low-quality blog posts online.