I scored some stripy woollen armwarmers with mitten flip-tops in a charity shop yesterday. I paid 50p for them but they had issues; hole near the base of one thumb, thumb worn through, button and button loop missing:
One visit to my button box and embroidery thread box (to make the loop) and 15 minutes later and they were fixed:
These feel like they were originally expensive and the fabric was otherwise in excellent condition but set me back only 50p. Do yourself a favour and learn to sew on buttons and sew up holes! So easy to do but it can save you a packet on replacing clothes and accessories.