…was a TomTom 1 satnav - for a fiver! Seems to work, so I should be able to flog it for a good deal more on ebay. Also got a spindle of 10 16x DVD-R disks for £2 - the shop that had them have several more packs, but I'm not sure I really need them at the moment.
later - looks like CEX buy these for more than I'll get on Ebay if I take a voucher rather than cash. I'll see what they say if I take it in.
later still - turns out that they want the charger, box, etc. to give that price - since I don't have them, I'll bung it on ebay instead.