Should I get a new vintage PC tower, a 2000s phone, or a new CRT monitor?

So for clarification, I have 3 CRTs at the moment (two are tvs and one is a computer monitor I use daily), 6 PCs (one is an old Dell tower while the rest are vintage laptops) and I have 3 Blackberry phones, an Iphone 6, and an old Alcatel flip phone, what do you guys think I should get next?