Though I never find supremely wonderful charity shop knitting bargains, I do hope that one day I will find a bag of cashmere for 50p or something. In the meantime, I think yesterday’s find wasn’t too shabby.
Just over 200g of pure wool, aran weight, price: £1.90. Well, I’m saying it’s pure wool. I’m basing this purely on the fact that a) it’s in skeins and b) feels like pure wool. 
The test will be if it felts. Not that I’m going to use it for felting, but it would be perfect for the background of the whales on the Pod of Cetaceans Cardigan I’m planning for Rose (once I’ve knitted her Willie, which I don’t even have the yarn for yet…) and that needs steekable yarn. It also needs to match the tension of any other yarn I use… but hey! Yarn bargain!
That Pod of Cetaceans Cardi is some serious cuteness with a capital C. I wonder if I could have gotten any more c’s into that last sentence?
Hi! If you want to be sure it’s pure wool, you don’t need it to felt (horror, when it’s not planned). I’d go for a burn test: wool has fireproof properties, so if you burn it, the flame burns out quite immediately.