Help, advice needed!!

I'm wanting some platform boots. I'm between the Jadon and the Sinclair.

I'm looking at buying second hand because I can't justify the cost of new 😖 especially because my last pair of docs 10 years ago I couldn't break them in (they were vegan ones) and gave up on them!

So just wondering if 2nd hand is an option, or will they be too moulded to their previous owners foot??!!