Online doesn't always reflect these prices as they are generally in store clearance. Not all locations will have the same prices. I've had good luck using brickseek to find locations (it isn't perfect). And sometimes its worth a trip to the store and asking them to price check it. Such as...
Replacing my saw horses with them since they require less room to store. They can more than handle the weight of my projects. The clamp just adds versatility.
Also curious how well they can be used for glue ups if needed.