I'm in need of 3 new tyres shortly. It would be 4 but I got a puncture last October sort of time so 1 tyre that's been on the back still has about 6mm of tread, as unfortunately I had to get a new one.

I like to have all 4 tyres the same make and model and try to keep them wearing evenly, so will be removing this other tyre that doesn't need changing too. I'm wondering if it's worth selling or keeping in case I do get another puncture or something?

If you've got the room, keep it. Could come in handy if you need a tyre at short notice and are short on funds.

It's a Hankook Ventus Evo2 so it's not a bad tyre and black circles sell them for £100 new (fitted) so may be able to get some money back for it but as you said, could be a handy spare