Sports betting hedging: why do sportsbooks charge different amounts to hedge

so i’ve been poking around looking at lines to hedge some of my parlays and honestly i’m getting weirded out by how much the cashout options vary from book to book. like, one site offers me way more to cash out early while another is super stingy even though the odds and bets are almost identical.

i always thought the cashout offers would at least be sorta close if the markets are in sync, but it’s pretty random. i get that juice and margins are different but this seems wild. anybody else run into this or am i missing something obvious here? i’m all about staying where i’m comfy but it feels like there’s no “standard” way they figure these cashouts.