I would have thought (hoped) it would be an easy enhancement to the website software, to have a filter for price ranges.I managed to buy one in block 325 for £30 last night. Most are £53, but you just have to keep clicking on individual seats until you find a £30 one.
A bonus : They’d be able to tell how many people care about price, by the % of people using the filter.
or colour the seats differently depending on their price range