The deal is back on at Costco, so it is worth while going to get some new tyres if you are at that stage (like me)
Example: Michelin (I'm guessing Energy Saver - I'll confirm later) 205/60/15
RRP: ~100EA from high street
Costco: ~89.98EA
minus 20%: ~71.99EA
All inclusive of fitting, balancing, disposal and Nitrogen (big whoop) gassing.
Enjoy
Edit: I realise this isn't really the place for this topic, but I'll move it later once it has it's exposure