The new system is definitely hitting low sale items the hardest, aside form a 4% fee on item price, the killer for low value items is also the 72p - 75 p. fee per item, added.
The only way forward I see for you, to at least make your items look a little more attractive , as you are selling some fantastic football memorabilia, then perhaps, group some items with a common theme, same Club, same item format say tickets / brochures, together, and sell as a bundle, at least then there's the one 75 p fee then to pay.
As said, not easy for some moving forward to make it still worthwhile to sell, one has to make it work, perhaps with selling more now, in a bundle / group format, for low value items?
@rogernicksonbits