I added the following items to my bazaar a few minutes ago:
25x camel plushie for 10,000 each
25x nessie for 51,000 each
Even though the camel plushie is usually worth around 95k, the warning did not trigger and I sold the camels for less than I bought them (also lowering the price of the 5 that were in the bazaar before). I am pretty sure I entered 100k though.
I know it's my fault for not double-checking the total worth of the items, but the warning has always worked so far and I learned to trust this feature.
Browser is Chrome on Android.
Edit: I did a small test. The warning works for a batch of pandas (tried price 8500) if they are the only items I'm adding. If I try to add the pandas (still for 8500) together with nessies (price 51,000), the warning does not appear.