Is testkitplus.com still a reliable source for testing reagents? I don't want to spend $100+ and nothing arrive. The most recent info I have seen from or about them was 2013-2014.
There are lots of good reagent test suppliers. As far as I know testkitplus is good but I haven't seen much discussion on them either way to be honest.
I help run www.reagent-tests.uk so I'm pretty biased but if you're in the UK I honestly believe you won't find a better supplier. Due to private funding we are also the cheapest in the world.
You can use the code "bluelight" for 11% discount too!