Yep... Like I said before, motherboards do appreciate in value
Maybe if you end up with an antique working prototype board signed by <famous hardware designer>; otherwise, no.
While I can see a vaguely plausible scenario whereby someone on this forum has paid more for a board than it originally sold for because of some scenario whereby it was essential to keep an old computer working until it could be properly decommissioned, but apart from incredibly niche scenarios like that, who would bother? Who knows whether a second-hand board 100% works, or whether the previous owner thrashed it with say a serious overclock, poor cooling and/or 24/7 CPU saturation.
If boards actually appreciated in value, it would stand to reason that CPUs would hold their value in a similar manner, partly because most CPUs aren't overclockable and they die a lot less often than boards do. After all, what good is a board without a CPU?
- edit - I've just checked most of the boards I've used in the ~13 years I've been in business, and of the models that were on ebay, they were all selling for approximately half the price that I originally paid for them, except for one 2012 board, and one 2014 board which is selling for triple what I paid for it, but frankly I'd file that one with the loonies who try to sell say Amiga 500s for £1000 UKP because some sap might actually pay that kind of money for them.