sanding sealer

I picked up a supply of these Blond Shellac 16oz packages, expiration date is June, 2023. They normally sell for $30-35, I can sell for $6 each plus shipping. I can get 4 packages into a Regional A box that would be $11 for shipping, if you want more then I can see how many I can get into a...

That is the question. Is there a close substitute for Mylands sanding sealer readily available at the usual box stores?

For those of you that use sanding sealer, what do you use? The reason I'm asking is that I was using a can of Woodrich that I really liked until it thickened up on me.:good: I tried some water based. Not good.:bad: I am now using Zinzer Bullseye (it's a shellac and alcohol mixture). I...