Fun anecdote: after a weekend of skiing a few years ago, I had a sore throat, went to One Medical and got a rapid strep test, and was charged $140 for what was a negative result.
The next day I was on a flight from SFO to Singapore, and it was extremely apparent I had strep. Upon landing in Singapore, I went to a clinic where they diagnosed the strep, gave me antibiotics, decongestants, sudafed (the good kind), throat lozenges, and ibuprofen. Total cost? $20 USD.