Hey @Jon thanks for the quick reply. Busy working on this right now.
SerpAPI is a lot more expensive than SERPER.dev so that is pretty much the only reason. There functionality is the same.
SERPER.dev also gives a large number of free credits which is super helpful when testing and getting set up before having to dig out the credit card.
I did find another thread where is was mention a serper.dev tool was about to be released for n8n?