Nobody answered yet so I'll try :D
Grab whatever best deal you'll find, because prices on the used market, especially for 5+year old devices, don't always follow a logic. So make sure to look out for the X390, X13, L13 yoga, etc, as well. Newer but they might be cheaper!
Personally I never bought Yogas so cant comment on that vs regular thinkpad. I had a touch T480 but the display was too dim to use outside (so I put a bright 1440p panel on it).