As others have said here and elsewhere, any item for sale is worth what someone is willing and able to pay for it. NIB guns sometimes go for more than MSRP. NOS car parts can be worthless. 3/4 of new price sounds like a good starting point for a cheapie bike.

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Whoever said there's nothing more expensive than a cheap Mercedes never had a cheap Jaguar.

83 300D Turbo with manual conversion, early W126 vented front rotors and H4 headlights 401,xxx miles
08 Suzuki GSX-R600 M4 Slip-on 26,xxx miles
88 Jaguar XJS V12 94,xxx miles. Work in progress.
99 Mazda Miata 183,xxx miles.