depends on a few things tbh, example ism if i was broken down with no spare on the M6 toll road and ya drove by and stopped and offered me it for 150 quid, i would rip ya arm off , matgbe given ya a blow job aswell
bit as for a general spare, dot think there worth much as there pointless
ok get ya home but ya cant go over 50mph,
not far off walking speed

, would be quicker to call the AA and get towed home