If the hyperdrug Lugols is the real deal, (email them for their breakdown of the solution), this would be an excellent price for this amount. I have found that vet sites are usually very accurate in their lugols, and the quality is very good, (at least here in Australia). I would definitely email them for a content analysis of their lugols.
The health leads Lugols also looks pretty good, at least they give you a good analysis of their product, it does seem a little expensive though.
I have used Lugols from a vet site in Aus, and it was an excellent product, and much cheaper than buying it elsewhere online. The site was more than happy to give me accurate information about the lugols they were selling, lol, I just didn't tell them it was for me to take :)