The price is based on the fact that demand is exceeding supply, whether the demand is from short covering or actual new longs. AZO has a fairly high short interest of nearly 12%, but that's not ridiculous like SYNA at 60%.
If you want to short a stock in this sector that you believe is priced at "ridiculous" levels, why not choose ORLY? Their trailing P/E is 23 compared to AZO's very reasonable P/E of 15. Just because AZO is a high priced stock doesn't mean it's "overpriced".
If you're looking to short them beyond intraday trading, I would recommend waiting for a more seriously overbought condition, or a truly confirmed breakdown of the trend.
If you want to short a stock in this sector that you believe is priced at "ridiculous" levels, why not choose ORLY? Their trailing P/E is 23 compared to AZO's very reasonable P/E of 15. Just because AZO is a high priced stock doesn't mean it's "overpriced".
If you're looking to short them beyond intraday trading, I would recommend waiting for a more seriously overbought condition, or a truly confirmed breakdown of the trend.

