The ones I have bought were from Zavvi when they eventually dropped to £14.99, which is still quite pricey IMO and I'd only pay that amount for the ones I really want. I'll wait until the others that I'm not desperate for drop to £10. The only Pop's I have are ones that came in Zbox's... some are ok I guess, but most are too cutesy for my liking as they look like baby versions of the characters or something lol. I agree that the Pixar/Disney ones like Inside Out look the best though, because the Pop style actually suits those characters.
Haha I couldn't make up my mind, so just slapped Best of Bowie on.