I agree that you can certainly use those but will also say I am hugely against buying used boots. They have already packed out and molded to the previous owners feet. Plus the fact those were step in are not ideal. also those must be old as hell because I cannot remember the last time Burton did step ins.
I would make the seller take them back. Sounds like you got screwed.
sorry i posted the previous thread before reading the last two
now i'm confused... the boots are confortable but a little rigid & heavy
& if i ask the seller to take them back, i'll have pay the shipping fees