They all have different requirements, and are all part of the same set.
The body armour has the lowest requirement of LVL 5 STR 6 (88 gold)
The Leg armour requires LVL 15 STR 18 (398 gold)
The Mace has the highest at LVL 20 STR 19 (870 gold)
IMO you might as well redeem it straight as away as your be able to use the armour before space becomes a problem and if you don't want them you can always sell them.
