Can a seller back out of a sale after accepting an offer and going through inspection?

Question Details: I recently placed an offer on a home with my fiance and the offer was accepted by the sellers. We proceeded with the older section and after the home inspection with him pleaded we requested items to be picked up defective in the se we proceeded with the home inspection and after the home inspection was completed we requested items to be repaired that came up defective in the inspection. The sellers have refused to fix items or lower the price of the home purchase. Our realtor is saying that this deal could potentially fall apart if we don't agree with their terms. I want to make sure what I am being told is true. Our realtor also told us that they were in a pinch so the seller would like to fix the home repairs but he is not a certified or licensed contractor.

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