This is an evaporative cooler fan, like new for the move-out sale. The link below from Home Depot shows $209 + Tax.
I would request $100. Please pick up at Menlo Park, or let me know if you like a drop off.

https://www.homedepot.com/pep/NewAir-470-CFM-3-speed-Portable-Evaporative-Cooler-and-Fan-for-250-sq-ft-Cooling-Area-NEC500WH00/316771971?source=shoppingads&locale=en-US&fp=ggl&pla=&mtc=SHOPPING-BF-CDP-GGL-D26P-026_002_AIR_CIRC_ACC-NA-NA-NA-PMAX-NA-NA-NA-NA-NBR-NA-NA-NEW&cm_mmc=SHOPPING-BF-CDP-GGL-D26P-026_002_AIR_CIRC_ACC-NA-NA-NA-PMAX-NA-NA-NA-NA-NBR-NA-NA-NEW-17697203498--&gclsrc=aw.ds&gad_source=1&gad_campaignid=17687898604&gbraid=0AAAAADq61UfWykD3PqO54yMzYwrD6i2dG&gclid=Cj0KCQjwoMXQBhDcARIsAH-eEtsc1l08rZJv0V43-m7VfFk8mQKiOdFm6_9paF4Im49DXAagpA0c03gaAotMEALw_wcB#overlay