3.7 diffs

3.727:1 diffs.  Anybody got an idea of how much these are worth?  Got 3
spares and was thinking of making space in the garage.  Guy who swapped me
one for a 5.35:1 also had a 3.5:1, but I guess that is a little extreme for
a road car.

Just curious, not yet sure I want to sell.

Sold my lathe today for a hundred quid and have now got the 'spring clean'
bug!

///
///  (If they are dupes, this trailer may also catch them.)