I have that stuff licked. All these places (especially discount joints like Tractor Supply, Princess Auto, HF, etc) are NOTORIOUS for this. They'll look on the computer, it says they have 3 units, you drive out there, and nothing!
Take heed folks. Call the store in question, and have them check inventory for stock#whatever. Do your homework- Look at catalogs or online, and make sure YOU know the stock/SKU#.
Anyways- If they say they have less than ,maybe 6 or 7 on hand, ask them to physicall check for you. This means putting you on hold, and going to look for it!!!
Why? Because the inventory system is not flawless. It is usually wrong by a few units. Sometimes things are miscounted. Then there's improperly performed returns and exchanges. Or an item is put in the WRONG place in the warehouse. Sometimes somebody has called and reserved one (I do this) and even though it shows in inventory, it is hidden and reserved.
Trust me, call, and have them look. My nearest Princess Auto is a 30 minute drive away. The next one is 45 minutes, and the third one is well over an hour. My closes Tractor Supply is 25 minutes away, and the other one is 40 minutes away. And I just ain't got it in me to drive that long for nothing...