My wife and I made an offer on a house which was accepted.

the house is an estate sale, and it is a bit of a mess cosmetically. There are very stained 35 year old carpets everywhere and two bathrooms are not functional and the kitchen needs to be changed. We knew this before we made the offer. The "bones of the house" are excellent and there is no insect or rodent issue at all. I ordered the air quality test as a condition when I made the offer to purchase the house. I had no particular reason to order the test, in other words, I had no suspicion, and neither did the agent. The test was done in the basement and revealed mold, and although the levels are moderate, it is still a reason for concern according to the 8 experts I have spoken to. Therefore, my approach today with the agent will be one of the following;1. walk away from the deal - the house failed inspection (least favored option)
2. get a price reduction
3. ask for more time to do more tests to find the source of the mould. I doubt the agent will let me do invasive tests, so the validity of the tests is questionable.Option #2 is what I am aiming for, but the house is a desirable house, in a very desirable location in the province of Quebec. We are quite educated concerning the market in the region, and are certain that there would be a lot of interest in the house. The house was listed at $325,000, and our accepted offer was at $300,000. The municipal evaluation is $325,000, which is low for the house for some reason.