Try https://www.dellrefurbished.ca

Generally speaking, if Ubuntu works, LMDE will work as well. Unless you have something that is brand brand new with drivers only located in a bleeding edge kernel, you shouldn’t have any issues.

I have LMDE on an old XPS17 and it actually worked with less fuss than standard Ubuntu, mainly because of compatibility with a truly ancient wireless chipset.

Mr. Clean Magic Erasers.

The “generic” name is melamine sponge. These work exactly the same and cost a fraction of the brand name.

Technically no. The tolerances should be more or less the same (generally 90%-110% label claim for the active ingredient) . Manufacturers aim for 100% and generally hit that target (or get very close to it).

The bioavailability could be different though - if you are doing a bioequivalence trial for generic VS brand, the generic would have to be between 80% - 120%. This difference is generally a result of the starches, fillers, and other stuff that may be in a generic formulation.

Same net effect as your comment (wider tolerances), but there is a bit more nuance.