I had a gastroscopy last week (5th one so far ), they do get a bit pricey so I know what you mean.
I am having a capsule endoscopy next week (the capsule camera), it goes on the medicare rebate scheme on Monday thankfully, I had to pay for it before I had the procedure about 6 months ago and it cost me $2000 (none of which could be refunded). This time it is around $400, I wish I had private insurance, but last time I looked into it the waiting period on pre-existing conditons made it not worth while in my particular case, so I just fork out the $$$ and try to get everything sorted ASAP. You can't put a price on good health.
My car would be a lot quicker by now if the Dr's didn't have all my money .