Not too bad if you need the earphones.

Been looking at re-sale and possibly £6-£8 after p&p / fees if you could sell for say £12.

Got a £7 off £50 spend voucher that could get me these for £11.24 each so 1044 CCP = approx. 2500 Avios.

Would get me Avios at maybe 0.8p each so not too bad but not amazing.

Do seem to be available on Tesco Direct as well so you could buy them through the BA e-store, use your BA Amex etc. for a few more Avios should that work for you.