im not being negative to be an arsehole or anything, its just going to be hard to shift tyres at those prices sadly, so figured a little reality check might help. id love to get plenty for my same sized tyres, but sadly it just isnt on the cards, 205 40 17is about the most common low profile tyre on the market, a really quick google result throws up sunews at 35quid each new

and not all part worns are dead, my mate regularly gets new stock for his garage, and the part worns can be easily as good as the 1s here. most garages wont even bother buying in anything sub standard as theres just no money in it. he managed to pick me up a 205 40 17 yokohama single tyre not so long ago, with 7mm tread, and it cost him a tenner from his trade supplier

so by all means, take my advice as negative, but i just see it as saving u having tyres for sale for months.