These are all relatively wide boots, 102-103mm last, for high volume feet(high instep). The liner of the Tecnica is likely totally packed out and useless, $10 might be too much money. The other two are only good if they fit your feet properly. If you have a narrow foot or low instep they are not for you. There is a reason Nordica dumped the Firearrow boot. Do your feet a favor, go see a knowledgeable boot fitter and, if you're on a budget tell them what your budget is. We have brand new boots starting at @$299 and that includes work to make it fit. I spent nearly two hours with a customer yesterday for a $299 sale and that included getting him more space for a pronounced bump on the side of his heel.
Used boots are generally used boots because the liners are packed out, which means no insulation.