Anyone know of a self storage with a true price of under $100/month?

I got a 6x6 climate controlled space at Extra Space Storage. This space was listed online at $40/month. But of course since they’re all liars, with fees and everything, came up to $70/month. Then now about 4 months later i get charged $123. What the hell?

Im no expert but $123 for a 6x6 seems way too expensive. I feel like reasonable would be under $100. Anyone know of a place?