That $250 usually covers real hours. A listing flight comes back as 20 to 40 clips of raw footage, and the first pass is ingesting and culling, throwing out anything with a wobble, a jump cut in the gimbal, or a neighbor's trash cans in frame. Then color, because footage shot in a flat picture profile looks washed out until it's graded, which is why the phone preview and the delivered file don't match. Then stabilization on any clip that needs it, trimming to a sequence that opens wide and works down to the house, and music.
Music is a genuine cost, not a rounding error. A single licensed track runs roughly $20 to $60, or a subscription runs a couple hundred a year, and using unlicensed music gets videos muted or pulled on the platforms where the listing lives. Editing software is another $20 to $60 a month. Two to four hours of labor plus export and upload time is a fair picture of a 90-second cut, and most operators promise two to five days.
The part to pin down in the quote is revisions and versions. Ask how many rounds of changes are included, because "can we swap the music and cut the intro" is another hour. Ask for a branded and an unbranded export, since many MLSs won't accept video with an agent's name or contact information in it, and length caps vary by MLS. If you're reselling this service, that unbranded copy is the thing agents will call you about at 8pm.