Well there is no TM for NeverSoft in the UK, but i'm pretty sure they could still argue some rights to it should they ever feel the urge, for this reason alone I can't see any massive resale value.
Pure Data on the other hand is a registered trademark belonging to Belkin Corporation.
Mark text:
PUREDATA
--------------------------------------------------------------------------------
UK case status: Registered
Original language: English
Second language: French
Class: 09
--------------------------------------------------------------------------------
Relevant dates
Filing date: 27.03.2003
Publication date: 11.07.2005
Registration date: 26.05.2005
--------------------------------------------------------------------------------
List of goods or services
Class 09:
Surveying, signalling, checking (supervision) apparatus and instruments; apparatus and instruments for conducting, switching, transforming, accumulating, regulating or controlling electricity; apparatus for recording, transmission or reproduction of sound or images; magnetic data carriers, recording discs; data processing equipment and computers; computer accessories, electronic devices, cables, connectors, surge protectors and other electrical accessories; amplifiers; answering machines; electric coils; electric collectors; computer keyboards; computer memories; computer peripheral devices; magnetic data media; data processing apparatus; electronic pocket translators; facsimile machines; laptop computers; mouse pads; mice; monitors (computer hardware); modems; portable telephones; telephone apparatus; telephone receivers; telephones; word processors; parts and fittings for all the aforementioned goods.
--------------------------------------------------------------------------------
Names and addresses
Applicant: Belkin Corporation
501 West Walnut Street, Compton, California, United States, 90220
Representative: WITHERS & ROGERS LLP
Goldings House 2 Hays Lane, London, United Kingdom, SE1 2HW
But so long as you don't use the domain under the Class 9 above, you should be fine.
Good luck