They've been a popular tool at prices higher than this in the past. Looking at 3xcamels this seems to be the lowest price they go (apart from that one time for what seems like 10min).
I bought a pair one of the last times they were posted just on the back of how much other people rated them. Never thought I'd actually use them, until I had to removed a handrail from a shower that had cammed out screws on it. Drilled out the heads, pulled the rail off and with these pliers I was able to unscrew the remaining bits of the screws out of the tiles/wall quickly and easily.
Highly recommend them.
I imagine they'd go great for rounded/broken bolt heads as well.
Thanks bought 2