okay so the CAVE (Lupin Foundation Technology & Research Kiosk) is literally the hidden gem you're looking for. it's in lamar dodd room s248. spring hours are mon-thurs 9-4, fri 10-3. they have:
sony mirrorless cameras (a7iii, a7riv, a7cr, a9iii!!)
tons of e-mount lenses (16-35, 24-70, 70-200...