Typically you're correct; power delivery design, audio, NIC etc are all generally top tier on the top tier motherboards.
BUT:
1. Outside of outright audiophiles, the audio solution on mid-range boards is usually more than sufficient
2. Networking benefits would mostly be Wifi on that board and, given it's relatively age (802.11n), you could achieve better performance with a modern USB3.0 802.11ac adapter.
3. OCing headroom is probably minimum. +10% or so (hypothetically) is unlikely to be "worth it".
I assume that motherboard is used? $55 is really low for "new old stock" status boards, especially a high-end board. If used, that OCing potential may/may not be a relevant consideration, as you've no idea how hard it was ridden in it's lifespan thus far.
The price difference (+$50 or so, on average) between a solid mid-range board and a high-end board is justifiable.... when new.
Investing $55 on a pretty dated platform (although still completely relevant) doesn't make a whole lot of sense to me.
For your use-case(s);
Gaming - a slightly higher OC might net you a couple of FPS more.
Movie/Music/Surfing/Learning - no noticeable difference
New language - If it an audio sense, there might be minor gains in audio quality. Nothing that'll make the difference between learning/not learning.
Add in the potential cost of a new Windows license if it can't be transferred (50/50 on Windows 10 and a motherboard switch in my experience thus far) then that might cost you +$150 or so... for a 5 year old motherboard that's probably used.... and will make between a negligible difference & absolutely no difference whatsoever in your use case(s), I just don't see it being worthwhile.