The edition of the Sear catalogue that has the Crispus and Constantius II ones hasn't been released yet, so the best I can offer is a Wildwinds search, which has prices normally a couple of years old. I think they're all around the $10 to $20 mark.
The Crispus one is VIRTVS EXERCITI, Thessalonica mint, officina delta (4).
This one, basically the same as yours, sold for $20.
This one went for $28.75, and
this one sold for $10.51. On that scale, I'd probably put it towards the lower end, around $15.
The Probus one is listed in Sear as #12030 (except he's facing the other way, RIC# 751). Yours is Salus seated, sixth officina (XXIVI) of the Siscia mint (RIC# 753). CV in the book $20 in VF.
This one with silvering intact sold for $28.50.
The Constantius II one is FEL TEMP REPARATIO, Alexandria mint, officina delta (4).
The only Wildwinds example is unpriced; I think it's probably around the $10 range.
To find values on Wildwinds, click the "text" link next to the coin in question; it'll show an archived
ebay or auction page, or other relevant statistics.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis