That's the selling price, postage doesn't come into it, that is what the record actually sold for. country of origin. It is probably, after an individual record list and a dealers website the most helpful and accurate price indicator. Popsike would be bottom of the pile.
Postage is a necessary evil regardless of its point of sale. Popsike, soul source, facebook, the sales are all world wide, just because the postage may be higher from one country doesn't make the record worth any less. Given that the record was a UK release I would hazard a guess most of these are UK sales, the £99 even says the shop is in Essex.