I ordered 7 issues online for 30 USD each and I'm thinking each time it's my last copy. Now I'm interested in issue 9 with Paul Smith and I'm anxious that it's not yet available online

Here in Switzerland these magazines are almost double the price than in the rest of Europe. I pay close to 20 USD for a copy of Esquire UK (or sometimes GQ UK). My wife is desperate by the big stack of Esquire (US, UK), The Rake, GQ (UK, France), Monsieur.fr, L'Uomo Vogue Italy, Fantastic Man that I accumulated in the last 3 years. I throw out GQ and L'Uomo Vogue but still collecting the others, I don't know why!
For how long do you keep these magazines?