Hot tub removal is priced differently from a regular junk pickup because the item is large, heavy, awkward, and often needs to be cut into manageable pieces.
The biggest cost factors are spa size, gate width, whether the tub is sunk into a deck, how far the crew carries pieces, and whether electrical disconnect is already complete.
Photos of the spa, access path, side gate, and pad area help produce a cleaner estimate before the crew arrives.