Count them up, list on Eabay and list at $1.00 for the batch and see what they end up selling for. I never saved my replaceed couplers, I just tossed them as I built the kits
Your coupler treasure trove is HO and mine in N but I have similar problems with the (Arnold) “Rapido” couplers I replace. I used ONE Rapido coupler, stood it on end and kitbashed it to represent (more or less) an N scale drill press. That still leves me with 899 unneeded old replaced couplers.
I don’t think HO X2f horn-hooks look anything like a drill press, so I dunno.
(off topic: this post is an experiment in getting back on the trains.com forum after not being able to get on it in about 2 months.)