Those look okay to me. I bought this cheaper scale. It's a bit smaller but I find it works fine with a deli cup on it. I like it better because it measures to the nearest tenth of a gram, which is handy for hatchlings. However, it only goes up to 1kg (most, if not all, geckos are less than 200g) - the one you were looking at only gives the nearest gram but it can weigh much heavier things if you were planning to use it for something else as well.
I also got this temperature gun. I found it slightly cheaper on ebay but either should work fine.