When a product reaches a certain age, most manufacturers erase it from history. They remove all traces of it (Kim Jong Un style). As if the product never existed. Stripping you of dignity and insulting your intelligence just for the mere thought of searching for something no longer sold as new.
HP is also dirty rotten motherfuckers for sanitizing old products and all info about them from their website. But it is interesting that HP at least confesses to the practice. A link was supposed to lead to HP’s site about an old laptop and instead the attached popup is presented.
Around the Laserjet II, IIP and III, this was no question. My last HP was a 3390 I received from work 20 years ago. HP stopped providing drivers (especially scanning ones), last ones were for XP. Works fine under Linux still, but since then I bought Brother.
I worked at a large corp that used them for years and I had no issue. Many models after the II all worked well. We had people on the team trained to fix the printers with access to order parts.
Last big place I worked at used Brother. Brother would ship a replacement if one our under contract devices failed.