Replying to B/S/T Reference in message to seller

I have multiple pairs of skis on B/S/T in the NS secret sale and factory blemished skis and when members message me asking for information about skis or start a discussion, I don't know which post they're responding to and every time I have to do the "which post are you responding to, NS doesn't say, I have multiple items" dance. I can't be the only user this affects, there must be more people with multiple items. FB marketplace has a system which says which ad a potential buyer is responding to.

Is it possible to put an RE: at the beginning of a message if they hit the Message User button in the B/S/T posting?