They've just had one of these ending last night for 30% off, but they seem to do a bit of jiggery pokery with the prices of some items. I was looking at an SKF timing belt kit plus a Contitech belt for imo the best combo of parts thought I'd lost a good deal from last night to this morning, but the parts appear to be 30% cheaper now = same price. I did get a full set of Bosch Aero retro fits on the offer though that was a real discount as they're 6.50 more expensive in total now.
ECP do like to swing their prices around to trap the unwarey. Another favorite of theirs is the misleading wording in their emails that suggest everything is reduced, but turns out its only specific product lines such as oil, wiper blades & service parts. I used to use them a lot, but now think there is better value at other retailers, only go to them for parts in emergency.