I saw a street market vendor with a pile of ~20 or so old TomToms. The price: 50¢ each, must buy in multiples of 2.
I would have loved to be able to flash them with some OSM-based app, but it does not exist AFAIK. It’s half-tempting to buy some if I see that vendor return because it could be fun to have some of the world’s smallest spinning patter hard drives. Indeed, if you open up an old #TomTom there are CompactFlash sized hard drives with tiny spinning platters which use a CF card interface. Probably of no practical use.
IMO, in a forward-thinking world TomTom would be forced to finance porting OSM to those obsolete devices. TomTom’s excuse for obsolescence is that their maps have outgrown the storage media capacity.
You can use log2ram to keep the log files in ram and only writing to the sdcard infrequently.