Thanks for the feedback. You can change the price to USD in the top bar of the page. We are working on a smarter way to set the currency on first visit.
In regards to the Mob Museum we will take a look and fix. Sometimes the APIs we use are not very specific in regards to child / adult pricing.
I'd say then the "Select an Offer" section feels a bit misleading.
Using our example, I'm seeing "headout.com - available today". The impression I get from this is I am able to get a ticket for today. Looking on the right, I see "from $86.25". This gives me the impression that I can get a ticket for today, starting as low as $86.
Clicking through the link however shows the tickets for today are $159. I get that on headout.com, when they say "from $69" they are implying there are days where tickets are $69, and I think it comes from nothing on their site saying "available today".
On your site however, I read it as I mentioned above. As my first click through resulted in an unexpected price hike (again, from my expectations, not reality), I had the same mental connection I have looking at coupons on RetailMeNot - I assume that most of the coupons are bogus or personal affiliation links. Not knocking the product, but this was my "user experience" interacting with it for the first time.
We just checked again and the prices are correct.
Some vendors charge a booking fee which they do not show at the first page but only if you proceed to checkout.
E.g. the last offer for $29 has $3 booking fee. We always show the full price including all fees.
Currently for us the limiting factor is API availability. Most of the official sites don't offer an API so we would need to scrape them one by one. For sites which offer an affiliate program we joined to finance the project but our ranking is not dependent on what we earn but strictly on price.