I sell in variations depending on size, from the smallest being £19.99 up to the largest being £54.99, doing a 5 tier pricing list depending on size. I increased prices recently and since then, I've had less issues with buyers since the ones willing to pay, simply pay without problem. The prices are:

59.99 - A4 12x8, bundle of 10

54.99 - 10x8, bundle of 10

49.99 - 8x6, bundle of 10

29.99 - 7x5, bundle of 10

19.99 - 6x4, bundle of 10

But with that comment, I'm not sure if I should put prices down. I've now put it up to £59.99 for the highest but it's above market price, which is at £3.99 to £4.99 each but I sell in bundles of 10, meaning my product is at £5.99 each. What would you do?